Question 6

What would be the notation for the mean of the y values?

A)b

B)(x, y)

C)yi

D)y

Question 8

Find the regression equation for the following data set

x143167143189122174134155

y8051594144595163

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 =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 =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