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AP Statistics Chapter 3 Review. As the ellipse formed by points on a scatterplot becomes thinner, the strength of the correlation between the scores:

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Presentation on theme: "AP Statistics Chapter 3 Review. As the ellipse formed by points on a scatterplot becomes thinner, the strength of the correlation between the scores:"— Presentation transcript:

1 AP Statistics Chapter 3 Review

2 As the ellipse formed by points on a scatterplot becomes thinner, the strength of the correlation between the scores: 1. Becomes lower 2. Becomes higher 3. Remains constant 4. Becomes zero

3 The lowest strength of correlation of the following is:

4 The following are resistant: 1. Least squares regression line 2. Correlation coefficient 3. Both of the above 4. Neither of the above 5. It depends

5 Fastest Responders (in seconds) 23.64Participant Participant Participant Participant Participant 14

6 Which of the following would not be a correct interpretation of r = -.30? 1. Variables are inversely related. 2. Coefficient of determination is % of variation between variables is linear. 4. There is a weak relationship between the variables. 5. All above are correct.

7 Equation for LSRL is y-hat = x. What is the residual for the point (4,7)?

8 Imagine two boys on a seesaw moving up and down. The r value of their heights off the ground would be:

9 Participant Scores 600Participant Participant 7 500Participant 8 500Participant Participant 17

10 If the correlation between X and Y is 0.94, which is true? 1. X causes Y 2. Y causes X 3. Low scores on X are associated with high scores on Y 4. Low scores on X are associated with low scores on Y.

11 A residual plot for linear data looks linear. 1. True 2. False

12 Test A results correlate with results on the Nat’l Merit Scholarship exam. Because of the negative sign, this relationship is considered to be weak. 1. True 2. False

13 Fastest Responders (in seconds) 7.8Participant Participant Participant Participant Participant 1

14 Switching the explanatory and response variables on a scatterplot affects the 1. Correlation 2. LSRL 3. Both the above 4. Neither the above 5. It depends

15 If the coefficient of determination between two variables is 0.81, then the correlation is True 2. False 3. It depends

16 A point on a scatterplot represents: 1. Two scores of 2 people. 2. One score made by 2 different people. 3. Two different scores of 1 person. 4. One score of 1 person.

17 Participant Scores 900Participant Participant Participant 1 800Participant 2 800Participant 11


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