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AP Statistics

AP Statistics . Chapter 3 Review. 0. As the ellipse formed by points on a scatterplot becomes thinner, the strength of the correlation between the scores:. Becomes lower Becomes higher Remains constant Becomes zero. 0. The lowest strength of correlation of the following is:. 0.26 -0.45

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AP Statistics

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  1. AP Statistics Chapter 3 Review

  2. 0 As the ellipse formed by points on a scatterplot becomes thinner, the strength of the correlation between the scores: • Becomes lower • Becomes higher • Remains constant • Becomes zero

  3. 0 The lowest strength of correlation of the following is: • 0.26 • -0.45 • 0.05 • -0.90

  4. 0 The following are resistant: • Least squares regression line • Correlation coefficient • Both of the above • Neither of the above • It depends

  5. Fastest Responders (in seconds)

  6. 0 Which of the following would not be a correct interpretation of r = -.30? • Variables are inversely related. • Coefficient of determination is .09. • 30% of variation between variables is linear. • There is a weak relationship between the variables. • All above are correct.

  7. 0 Equation for LSRL is y-hat = 1.3 +0.73x . What is the residual for the point (4,7)? • 2.78 • 3.00 • 4.00 • 4.22 • 7.00

  8. 0 Imagine two boys on a seesaw moving up and down. The r value of their heights off the ground would be: • 0.00 • 1.00 • -1.00 • 0.50 • -0.50

  9. Participant Scores

  10. 0 If the correlation between X and Y is 0.94, which is true? • X causes Y • Y causes X • Low scores on X are associated with high scores on Y • Low scores on X are associated with low scores on Y.

  11. 0 A residual plot for linear data looks linear. • True • False

  12. 0 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. • True • False

  13. Fastest Responders (in seconds)

  14. 0 Switching the explanatory and response variables on a scatterplot affects the • Correlation • LSRL • Both the above • Neither the above • It depends

  15. 0 If the coefficient of determination between two variables is 0.81, then the correlation is 0.90. • True • False • It depends

  16. 0 A point on a scatterplot represents: • Two scores of 2 people. • One score made by 2 different people. • Two different scores of 1 person. • One score of 1 person.

  17. Participant Scores

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