AP Statistics Practice Multiple Choice

JavaScript isn't enabled in your browser, so this file can't be opened. Enable and reload.

First Name: *

Last Name *

Email Address *

1. All but one of the statements below contain a mistake. Which one could be true?

A) There is a high correlation between cigarette smoking and gender.

B) The correlation between age and weight of a newborn baby is r-0.83 ounces per day.

C) The correlation between a person's age and vision (20/20?) is r=-1.04.

D) The correlation between the species of tree and its height is r=0.56.

E) The correlation between blood alcohol level and reaction time is r=0.73

Clear selection

2. Which Statement about correlation is true? (I. Regression based on data that are summary statistics tends to result in a higher correlation.) (II. If r-squared=0.95, the response variable increases as the explanatory variable increases.) (III. An outlier always decreases the correlation.)

A) None

B) I only

C) II only

D) III only

E) I, II, and III only

Clear selection

3. Which statement about residuals plot is true? (I. A curved pattern indicates nonlinear association between the variables.) (II. A pattern of increasing spread indicates the predicted values become less reliable as the explanatory variable increases.) (III. Randomness in the residual indicates the model will predict accurately.)

A) I only

B) II only

C) I and II only

D) I and III only

E) I, II, and III

Clear selection

4. Which of A-D is NOT a source of caution in regression analysis between two variables?

A) Extrapolation

B) subgroups with different characteristics

C) a lurking variable

D) an outlier

E) All of these are potential problems

Clear selection

5. A LSRL was fitted to the weekly cost of groceries in dollars (cost) versus the number of household members (number) for a group of families. The resulting equation is cost=-33.22 + 44.77 (number). A randomly selected family of four spends $135 on groceries in an average week. What is the difference between this family's actual cost and the predicted average family cost?

A) -$10.86

B) -$0.24

C) $0.24

D) $10.86

E) $145.86

Clear selection

6. The coefficient of determination, r-squared, between two variables is computed to be 81%. Which of the following statements must be true?

A) Large values of the explanatory variable correspond with large values of the response variable.

B) Large values of the explanatory variable correspond with small values of the response variable.

C) A cause-and-effect relationship exists between explanatory and response variables.

D) There is a strong, positive, linear relationship between the explanatory and response variables.

E) Approximately 81% of the variability in the response variable is explained by linear regression on the explanatory variable.

Clear selection

7. The correlation between the depth (in feet) and length (in feet) for a sample of caves is found to be -0.346. If the measurement of depth is converted to meters, what will be the resulting correlation? (1 ft = 0.3048 m)

A) -0.627

B) -0.346

C) -0.105

D) 0.105

E) 0.346

Clear selection

8. Which of the following statements is (are) correct? (I. Correlation makes no distinction between explanatory and response variables) (II. The sign of r reflects the strength of the association) (III. r measures the strength of a linear relationship only)

A) I only

B) II only

C) III only

D) I and II

E) I and III

Clear selection

Submit

Clear form

Never submit passwords through Google Forms.

Forms

This form was created inside of Leyden High Schools.