a. fluid mosaic These cities may have anywhere between 10 to 100 shops. b. bacteria Which statement is most accurate regarding bacteria reproduction? a. bacterial flagellum: ATP driven There is a positive linear correlation between the number of days a family visited and a higher, B. Direct link to Lauren H.'s post Would a V shaped scatter , Posted 5 years ago. a. Membrane proteins are free to move in two dimensions in the bilayer. Lorem ipsum dolor sit amet, consectetur adipisicing elit. Here's the basic idea behind any normal probability plot: if the data follow a normal distribution with mean \(\mu\)and variance \(^{2}\), then a plot of the theoretical percentiles of the normal distribution versus the observed sample percentiles should be approximately linear. Identifying statements consistent with the relationship between variables Identifying valid conclusions about correlation and causation for data shown in a scatterplot Identifying a factor that could explain why a correlation does not imply a causal relationship How can we determine if variables are correlated? Mary is making a scatter plot from two data sets. Y values are taken on the vertical y axis, and standardized residuals (SPSS calls them ZRESID) are then plotted on the horizontal x axis. b. protect from dehydration only Which of the following statements concerning endocytosis and exocytosis is true? Find 45 on the x axis and go up until you reach the same line as 140 on the y axis. Based. Hope I helped you! The Pearson correlation is calculated for a sample of n = 20 individuals. b. bacterial cells a. dipicolinic acid. What is the value of SP for the following set of data? A. a defective enzyme in the mitochondria B. defective actin molecules in cellular microfilaments C. defective dynein molecules in cilia and . c. Gram-negative bacteria only X Y 3 10. e. pili, The cells illustrated in Figure 3-1 (http://imgur.com/a/uAxKA) are in a(n) ________ environment. Scores: 1, 1, 1, 1, 3, 6, 6, 6, 9. The points in the scatterplot lie very close to a straight line. a. algae; glycocalyx present Is the species expected to be polar or nonpolar? e. both active transport and group translocation. Specifically, heteroscedasticity increases the variance of the regression coefficient estimates, but the regression model doesnt pick up on this. The scatterplot falls diagonally in a relatively narrow pattern. 4.6 - Normal Probability Plot of Residuals, 4.6.1 - Normal Probability Plots Versus Histograms, 1.5 - The Coefficient of Determination, \(R^2\), 1.6 - (Pearson) Correlation Coefficient, \(r\), 1.9 - Hypothesis Test for the Population Correlation Coefficient, 2.1 - Inference for the Population Intercept and Slope, 2.5 - Analysis of Variance: The Basic Idea, 2.6 - The Analysis of Variance (ANOVA) table and the F-test, 2.8 - Equivalent linear relationship tests, 3.2 - Confidence Interval for the Mean Response, 3.3 - Prediction Interval for a New Response, Minitab Help 3: SLR Estimation & Prediction, 4.4 - Identifying Specific Problems Using Residual Plots, 4.7 - Assessing Linearity by Visual Inspection, 5.1 - Example on IQ and Physical Characteristics, 5.3 - The Multiple Linear Regression Model, 5.4 - A Matrix Formulation of the Multiple Regression Model, Minitab Help 5: Multiple Linear Regression, 6.3 - Sequential (or Extra) Sums of Squares, 6.4 - The Hypothesis Tests for the Slopes, 6.6 - Lack of Fit Testing in the Multiple Regression Setting, Lesson 7: MLR Estimation, Prediction & Model Assumptions, 7.1 - Confidence Interval for the Mean Response, 7.2 - Prediction Interval for a New Response, Minitab Help 7: MLR Estimation, Prediction & Model Assumptions, R Help 7: MLR Estimation, Prediction & Model Assumptions, 8.1 - Example on Birth Weight and Smoking, 8.7 - Leaving an Important Interaction Out of a Model, 9.1 - Log-transforming Only the Predictor for SLR, 9.2 - Log-transforming Only the Response for SLR, 9.3 - Log-transforming Both the Predictor and Response, 9.6 - Interactions Between Quantitative Predictors. What percentage of the variance for the Y scores is predicted by its relationship with X? Independence of residuals. Direct link to JustinIsCrackedAtFortniteMyGuy's post You kinda don't. What if the data is clumping in one corner? answer choices. )There is an outlier in the plot, and if the least-squares What is the predicted value of Y for X = 4? Statistical theory says its okay just to assume that \(\mu = 0\) and \(\sigma^2 = 1\). Direct link to Louis Emmy's post Hi! c. eukaryotes What is the pH\mathrm{pH}pH if 12mL12 \mathrm{~mL}12mL of 0.20M0.20 \mathrm{M}0.20M hydrochloric acid is added to 125mL125 \mathrm{~mL}125mL of buffer? either a positive or negative correlation near 0. Which of the following statements is consistent with the scatterplot? What would the scatter plot show for data that produce a Pearson correlation of r = +0.88? b. So if a V shaped scatter plot is nearly symmetric, there is expected to be little or no (linear) correlation. Which of the following is unique to archaea? Assuming that SSY is constant in a research study, which of the following correlations would have the largest SSresidual? Clearly, the condition that the error terms are normally distributed is not met. a. a biolfilm e. eukaryotic flagellum: hydrogen ion gradient driven, Which of the following is paired INCORRECTLY? Which chemical is used in both water purification and sewage treatment to provide long-term disinfection? Linearity - we draw a scatter plot of residuals and y values. Data with a negative correlation means that there is no association between the variables. In regression analysis, heteroscedasticity (sometimes spelled heteroskedasticity) refers to the unequal scatter of residuals or error terms. c. eukaryotic cells This demonstrates how correlations can be used to demonstrate _____. 300 seconds. a. active transport A scatterplot plots points x y axis. c. eukaryotes only. For a two-tailed hypothesis test evaluating a Pearson correlation, what is stated by the null hypothesis? a. This type of regression assigns a weight to each data point based on the variance of its fitted value. Equal variance of residuals. A scatterplot is a type of data display that shows the relationship between two numerical variables. To log in and use all the features of Khan Academy, please enable JavaScript in your browser. d. mycolic acid. Which of the following statements is consistent, A cell phone company collected data on the average number of texts sent in a given day based on, the age of their customers. What is indicated by a Pearson correlation of r = +1.00 between X and Y? This is how you make and use a scatterplot/ scatter graph. line were fit to the data, it would have a negative residual. Let's take a look at examples of the different kinds of normal probability plots we can obtain and learn what each tells us. d. archaea and eukaryotes only. Which type of correlation would you expect? a. ions only Question: This graph is the residual plot associated with a scatterplot of concentration against distance from a roadway (in km) for the change in the level of a pollutant from car exhausts as you go away from the road. d. Gram-positive bacteria only Which of the following statements is most consistent with this information? Bacteria of the genus Mycoplasma lack cell walls. This cone shape is a telltale sign ofheteroscedasticity. Chapter 025 Applied and Industrial Microbiolo, Julie S Snyder, Linda Lilley, Shelly Collins, Medical Terminology: Learning Through Practice, Barbara T Nagle, Hannah Ariel, Henry Hitner, Michele B. Kaufman, Yael Peimani-Lalehzarzadeh, Dutton's Orthopaedic: Examination, Evaluation and Intervention, Bio Lab Ecological Relationships and Exotoxic. This makes it much more likely for a regression model to declare that a term in the model is statistically significant, when in fact it is not. (b) The scatterplot of Yt versus Yt 1 will display a positive linear trend and the scatter-plot of Yt versus Yt 2 will display a positive linear trend. a. a hydrogen ion gradient The pth percentile value reduces to just a "Z-score" (or "normal score"). Again, the condition that the error terms are normally distributed is not met. Then it would have no linear correlation, and should be marked as having no correlation/no linear correlation. This website is using a security service to protect itself from online attacks. b. cytoplasmic membranes. a. attach to surfaces only Positive: trending upwards from left to right Negative: trending downwards from left to right If the dots on a scatterplot are not following a pattern, then there is no correlation. We could proceed with the assumption that the error terms are normally distributed upon removing the outlier from the data set. A Spearman correlation coefficient should be computed to assess the correlation between variables when both variables are measured using a(n) _____ scale of measurement. e. move like a whip. Note that the relationship between the theoretical percentiles and the sample percentiles is approximately linear. Which of the following statements concerning fimbriae is true? 2 3 Specfically, it refers to the case where there is a systematic change in the spread of the residuals over the range of measured values. 9 1. 300 seconds. So if there was a scatterplot where all of the points formed a near 'O' shape, there would be very little correlation. Which of the following cellular components facilitate(s) the process of bacterial binary fission? e. plant cell walls. A stem plot of the data would be skewed left c. A stem plot of the data would be skewed right d. The data set must be so large that it would be better to draw a histogram rather than a stem plot b. It is difficult to locate outliers on a scatterplot. Biotechnology includes all of the following except_______________________. The study of the practical use of microbes in various industries and technologies is __________. Which kind of correlation is likely to be obtained for these two variables? Which of the following Pearson correlations shows the greatest strength or consistency of relationship? The Pearson's r value represents the degree to which X and Y scores covary together relative to how much X and Y scores vary separately. d. both bacterial and eukaryotic cells The action you just performed triggered the security solution. If a hypothesis test is used to determine whether the correlation is significant, which df value would be used for the t statistic? For example, instead of using the population size to predict the number of flower shops in a city, we may instead use population size to predict the number of flower shops per capita. d. mitochondrion Using a microscope, you observe an amoeba moving toward a food source. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Statology is a site that makes learning statistics easy by explaining topics in simple and straightforward ways. c. Phagocytosis is a type of endocytosis in which liquids are brought into the cell. B. Which statement is true regarding pasteurization? c. eukaryotes For the linear equation Y = 2X - 3, which of the following points will not be on the line? Which of the following statements regarding coliform bacteria is correct? Click to reveal )There is an outlier in the plot, and if the least-squares e. contraction of cytoskeletal proteins, Which of the following is a CORRECT pairing? Each member of the dataset gets plotted as a point whose x-y coordinates relates to its values for the two variables. Which of the following is an infectious protein? A set of n = 25 pairs of scores (X and Y values) in a research study has a Pearson correlation of r = 0.80. If each of the X values are multiplied by 2 and the correlation is computed for the new scores, which value will be obtained for the new correlation? An HR director collected data on all the employees at her company and concluded that there, is no correlation between the number of sick days taken by an employee and their overall job, performance (as graded by their supervisor). There is a reasonable explanation for a cause and effect relationship. Direct link to green_ninja's post Making the precipitation , Posted 2 years ago. 2 4 Direct link to oscarjt's post if you had an X shape as , Posted 4 years ago. Which of the following may have cell walls containing teichoic acids? Cloudflare Ray ID: 7c0681cf6da30350 In the scatterplot pictured above, the x-axis represents the amount of time (in days) that a given, family spent visiting Magical Land Theme Park, while the y-axis represents the customer, satisfaction score (on a scale of 1 to 10) that they provided at the conclusion of their visit. Statistics and Probability questions and answers, Which of the statements below is consistent with the following A When conditions are ideal, bacteria can reproduce by fission at very high rates in a short period of time. You interpret a scatterplot by looking for trends in the data as you go from left to right: If the data show an uphill pattern as you move from left to right, this indicates a positive relationship between X and Y. Which proportion (or percent) of the variability in weight can be explained by its relationship with height? d. fungi; chitin, glucomannan and/or cellulose cell wall Based on, the line of best fit, what is a reasonable estimate for the number of text messages sent in a given, The scatterplot above shows data from a random sample of European men, which includes their, height (in meters) and weight (in kilograms), along with a line of best fit. The position of each dot on the horizontal and vertical axis indicates values for an individual data point. c. fimbriae voluptates consectetur nulla eveniet iure vitae quibusdam? b. diffusion You can email the site owner to let them know you were blocked. The scatter plot shows the relationship between the number of chapters and the total number of pages for several books. Which is the regression equation for predicting Y from X? There is a linear relationship between the number of sick days taken and an employee'soverall job performance. e. no, The cell walls of some ________ are composed of proteins. Consider a simple linear regression model fit a simulated dataset with 9 observations so that we're considering the 10th, 20th, , and 90th percentiles. multiplying each X and Y score by a negative constant value. )There is an outlier in the plot, and if the least-squares For the analysis of regression testing the significance of the equation, what are the df values for the F-ratio? B. "Live and Active Cultures" on the label of many yogurt products means that___________________. It is not affected. E. There is no correlation between the number of days a family visited and a higher customer, 34. b. archaea; polysaccharide cell wall Which of the following statements is consistent with the HR director's findings? Heteroscedasticity is a problem because ordinary least squares (OLS) regression assumes that the residuals come from a population that has homoscedasticity, which means constant variance. d. osmosis. lgae are commonly grouped by their type of. 3 4 b. hami 15 chapters. The lipids that are NOT generally components of cell membranes are A researcher conducts a hypothesis test to examine the hypothesis that stress is positively associated with greater impulsive decision-making. a. centrioles Which of the following statements explains how the correlation is affected? Cloudflare Ray ID: 7c0682193c9a30fa c. mycolic acid Once you do that, determining the percentiles of the standard normal curve is straightforward. Which kind of correlation is likely to be obtained for these two variables? There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. b. Endocytosis produces a structure called a food vesicle. c. group translocation. How to Use PRXMATCH Function in SAS (With Examples), SAS: How to Display Values in Percent Format, How to Use LSMEANS Statement in SAS (With Example). The line of best fit for the data is also shown. (a) What is the speed in m/s of the roller coaster at point B? Which statement below is consistent with the null hypothesis for this hypothesis test? Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. There is a weak linear association between X and Y. C. There is a strong linear association between X and Y. D. The points in the scatterplot have a steep slope. The correlation between amount of television violence consumed and amount of violent behavior is an example of a _____ correlation. Scatter plots are used to observe relationships between variables. b. cellular motility. There are three common ways to fixheteroscedasticity: One way to fix heteroscedasticity is to transform the dependent variable in some way. The residual is defined as the difference between the observed height of the data point and the predicted value of the data point using a prediction equation. c. hypotonic You just, Posted 3 years ago. The following histogram of residuals suggests that the residuals (and hence the error terms) are not normally distributed. As the X- values increase (move right), the Y -values tend to increase (move up). "Live and Active Cultures" on the label of many yogurt products means that_____. d. protozoa D. 60 min. c. small hydrophilic molecules only d. An analysis of regression is used to test the significance of a linear regression equation based on a sample of n = 20 individuals. 15 chapters. e. passive. Each member of the dataset gets plotted as a point whose. modifying antibiotics with different chemical functional groups to increase their potency. Which of the following statements about scatterplots is TRUE? In most cases, this reduces the variability that naturally occurs among larger populations since were measuring the number of flower shops per person, rather than the sheer amount of flower shops. what correlation would a straight vertical line scatter plot be. A researcher measures IQ and weight for a group of college students. Coliforms derive from the intestinal tract and therefore indicate fecal contamination. increases in X tend to be accompanied by increases in Y. b. are driven by the flow of hydrogen ions. e. triglycerides. Small water soluble molecules move freely across the bilayer. Employees who take fewer sick days taken tend to have a better overall job performance. We may conclude that: A.the correlation between x and y is close to 0 because although there is a strong relationship between these variables, it isn't a linear relationship. Another way to fixheteroscedasticity is to use weighted regression. . Correlation coefficients have a probability (p-value), which shows the probability that the relationship between the two variables is equal to zero (null hypotheses; no relationship). Which of the following is not caused by an emerging virus? Direct link to MichaelP's post If it was a perfectly sym, Posted 4 years ago. c.) It is affected by an influential point. A scatterplot of B vs. D shows a strongly curved shape, but taking the natural logarithm of both variables produces a linear scatterplot. If a V shaped scatter plot is perfectly symmetric, there would be no (linear) correlation. For the regression equation, = -2X + 6, if the X value is above the mean (positive deviation), what can be determined about the predicted Y value? There are too many extreme positive and negative residuals. What is the Pearson correlation for these data? Consider a dataset that includes the annual income and expenses of 100,000 people across the United States. subtracting the total sum of squares collapsed across all scores, If the following seven scores are ranked from smallest (#1) to largest, which rank should be assigned to a score of X = 6? Which correlation should be used to measure the relationship between gender and grade point average for a group of college students? a. Endocytosis is a form of passive transport, whereas exocytosis is a form of active transport. Direct link to Ian Pulizzotto's post If a V shaped scatter plo, Posted 4 years ago. Scores: 1, 1, 3, 6, 6, 6, 9. Direct link to azaria murphy's post Mary is making a scatter , Posted 2 years ago. Which of these characteristics apply to smooth muscle? The plot is used to detect non-linearity, unequal error variances, and outliers. Experts are tested by Chegg as specialists in their subject area. attachment - penetration - biosynthesis - maturation - release. c. phospholipids. d. lack a basal body. Which of the following statements regarding coliform bacteria is correct? Maybe we can put the height on the y axis and the weight on the x axis. Which of the following statements is true concerning the fluid mosaic model? Approximately 2 dozen points are fall diagonally in a relatively narrow patterm between (1 half, 6) and (8, 2). Required fields are marked *. D. Spending less time at the park caused families to be more satisfied with their experience. What is the value of SP for these data? Which one of the following is a correct regression equation for these data? The following histogram of residuals suggests that the residuals (and hence the error terms) are not normally distributed. d. The phospholipids form a rigid structure. Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. c. lipopolysaccharides. The scatter plot shows the relationship between the number of chapters and the total number of pages for several books. I do, Posted 4 months ago. Direct link to JB & P Smand witchA's post If you had an "O" shape, , Posted 4 months ago. 85.184.248.119 d. These processes occur in both prokaryotes and eukaryotes. Previous question Next question 1 4 a. bacterial glycocalyces. It represents data points on a two-dimensional plane or on a Cartesian system. e. both facilitated diffusion and active transport, Which of the following chemical substances contributes to the unique characteristics of acid-fast bacteria? This website is using a security service to protect itself from online attacks. The vertical height above ground level at position A is 200 m. Neglect friction. a. Endocytosis is a form of passive transport, whereas exocytosis is a form of active transport. e. both ions and hydrophilic molecules, Which of the following processes requires a carrier protein? The data appear to have a pattern on the scatterplot. A Pearson value of r = 0.50 is obtained for the relationship between the X and Y scores. a. fatty acids. Heteroscedasticity occurs naturally in datasets where there is a large range of observed data values. c. hopanoids. Each time X increases, there is a perfectly predictable increase in Y. The graph shown below shows the relationship between the age of drivers and the number of car accidents per. a. all prokaryotes the scatter plot looks "pseudo-random" but with a curious peak (increased number of accidents) in the data between 10 and 11.5. If the data show a downhill pattern as you move . Except where otherwise noted, content on this site is licensed under a CC BY-NC 4.0 license. The simplest way to detectheteroscedasticity is with a fitted value vs. residual plot. Viruses have envelopes. d. ATP a.) All values estimated. Approximately 2 dozen points are scattered sporadically between x = 1 half and x = 9, and between y = 2 and y = 9. This computer output below is for a least squares linear regression of ln (B) vs ln (D) for 9 white pine trees. b. a sodium ion gradient b. external digestion of large biological molecules Which of the statements below is consistent with the following d. prokaryotes What is the regression equation for predicting Y? 5 1 For example, you have the height and weight of a student named Emmy, like you! A researcher assesses work ethic among college students using a self-report questionnaire. B. b. hypertonic Which of the following is a reasonable hypothesis for the molecule basis of this disorder? Section uses a "firefly" analogy to illustrate how the wave mechanical model for the atom differs from Bohr's model. For example: Some datasets are simply more prone to heteroscedasticity than others. In regression analysis, heteroscedasticity (sometimes spelled heteroskedasticity) refers to the unequal scatter of residuals or error terms. c. facilitated diffusion c. assembly and disassembly of microtubules This tutorial explains how to detectheteroscedasticity, what causesheteroscedasticity, and potential ways to fix the problem ofheteroscedasticity. b. bacterial flagellum: microtubule protein Performance & security by Cloudflare. Statology Study is the ultimate online statistics study guide that helps you study and practice all of the core concepts taught in any elementary statistics course and makes your life so much easier as a student. One set of data gives the amount of precipitation in inches. X Y Endospores survive a variety of harsh conditions in part because of the presence of Bacterial cell walls that are resistant to drying contain. One common way to do so is to use arate for the dependent variable, rather than the raw value. The flagella of archaea are similar to bacterial flagella but differ in that they Scatterplots can identify curvilinear relationships Scatterplots are only useful in identifying linear relationships More than two variables can be easily shown on a scatterplot Differences in data from two different populations would not show up on a scatterplot Expert Answer 100% (14 ratings) Direct link to RJA's post I feel good about my know, Posted 2 years ago. B When conditions are poor, bacteria can easily adjust and reproduce in the new environment c. bacteria; peptidoglycan cell wall It is affected by inappropriate grouping. When conducting a residual analysis, a " residuals versus fits plot " is the most frequently created plot. d. sterols. Get started with our course today. Scatter plots are the graphs that present the relationship between two variables in a data-set. A set of n = 20 pairs of X and Y scores has SSX = 10, SSY = 40, and SP = 30. You kinda don't. The scatterplot below shows a typical fitted value vs. residual plot in which heteroscedasticity is present. scatterplot? e. both Gram-positive and Gram-negative bacteria, What is the function of the cellular structure indicated by "c" in Figure 3-2 (http://imgur.com/a/XaEtx)? Which of the following statements is consistent with this evidence?