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AP Statistics Chapter 3 Review. 1. 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. 1. 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 1. 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 12345 10

3 2. The lowest strength of correlation of the following is: 10 1. 0.26 2. -0.45 3. 0.05 4. -0.90 12345

4 3. The following are resistant to outliers: 10 1. Least squares regression line 2. Correlation coefficient 3. Both of the above 4. Neither of the above 5. It depends 12345

5 4. Which of the following would not be a correct interpretation of r = -.30? 10 1. Variables are inversely related. 2. Coefficient of determination is.09. 3. 30% of variation between variables is linear. 4. There is a weak relationship between the variables. 5. All above are correct. 12345

6 5. Equation for LSRL is y-hat = 1.3 +0.73x What is the residual for the point (4,7)? 10 12345 1. 2.78 2. -2.78 3. 1.30 4. -4.22 5. 7.00

7 6. Imagine two boys on a seesaw moving up and down. The r value of their heights off the ground would be: 10 1. 0.00 2. 1.00 3. -1.00 4. 0.50 5. -0.50 12345

8 7. If the correlation between X and Y is 0.94, which is true? 10 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. 12345

9 8. A residual plot for linear data looks linear. 1. True 2. False 10 12345

10 9. Test A results correlate -0.94 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 10 12345

11 10. Switching the explanatory and response variables on a scatterplot affects the 10 1. Correlation 2. LSRL 3. Both the above 4. Neither the above 5. It depends 12345

12 11. If the coefficient of determination between two variables is 0.81, then the correlation is 0.90. 10 1. True 2. False 3. It depends 12345

13 12. A point on a scatterplot could represent: 10 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. 12345


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