Question 6What would be the notation for the mean of the y values? A)b B)(x,

y)

C)yi

D)y̅

Question 8

Find the regression equation for the following data set

x      143     167    143    189    122    174    134    155

y       80      51     59     41     44     59     51     63

A)-0.10x + 70.90

B)cannot be determined

C)-0.10x – 70.90

D)0.10x + 70.90

Question 9

A data set whose original x values ranged from 41 through 78 was used to generate a regression equation of ŷ=5.3x – 21.9. Use the regression equation to predict the value of y when x=81.

A)391.2

B)451.2

C)Meaningless result

D)318.7

Question 10

A data set whose original x values ranged from 120 through 351 was used to generate a regression equation of ŷ=0.06x + 14.2. Use the regression equation to predict the value of y when x=352.

A)35.32

B)Meaningless result

C)6.92

D)28.22

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