Chapter 5 Review

AP Statistics

Question #1

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T1

test grades Scatter PlotA. r = 0.40

B. r = 0.90

C. r= 1.00

D. r = -0.10

E. r = -0.85

Question #2A. r = 0.40

B. r = 0.90

C. r= 1.00

D. r = -0.10

E. r = -0.85

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100

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50 55 60 65 70 75 80 85 90 95 100 105

T1

test grades Scatter Plot

Question #3A. r = 0.40

B. r = 0.90

C. r= 1.00

D. r = -0.10

E. r = -0.85

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50

60

70

80

90

100

110

50 55 60 65 70 75 80 85 90 95 100 105

T1

test grades Scatter Plot

Question #4A. r = 0.40

B. r = 0.90

C. r= 1.00

D. r = -0.10

E. r = -0.85

40

50

60

70

80

90

100

110

50 55 60 65 70 75 80 85 90 95 100 105

T1

test grades Scatter Plot

Question #5A. r = 0.40

B. r = 0.90

C. r= 1.00

D. r = -0.10

E. r = -0.85

40

50

60

70

80

90

100

110

50 55 60 65 70 75 80 85 90 95 100 105

T1

test grades Scatter Plot

Question #6Is the statement true or false? If false explain

what is wrong with the statement.

A.The correlation between eye color and weight is very strong with r = 0.95.

B.If r = 1 then the scatterplot will consist of points that all lie on the same line.

C.If the correlation coefficient for x and y is very small then we may say that there is no cause and effect relationship between x and y.

Question #7Suppose the LSRL for hours of sleep the night

before the ACT and score on the ACT is given by

(Score) = 19.55 + 0.4558(Hours of sleep)

If Joy had 7 hours of sleep the night before she took the ACT and her residual is 2, then her ACT score was ___________.

Question #8Which of the following would you expect to

have r<0?A.x = Height of student, y = weight of student

B.x = Temperature of the day, y= number of people wearing coats

C.x = time to swim 1 mile, y = time to swim 200 feet

Question #9Given the following values for x and y. The

graph of the LSRL must pass through which point.

X Y

2 4

7 9

10 15

Question #10A statistician conducts a study on x =

height and y = shoe size and find that the equation of the LSRL is (Shoe size) = -5.6 + (1/5)(height) and r = 0.85.

If the roles of x and y are reversed and a new equation is calculated in the form (Height) = a + b(shoe size) what are the new values of b and r?

Question #11See Fathom…..