Question 11Find the regression equation for the following data

set

x      2      8      5      9      4      3      9      6      7      8

y      3      6      5      7      9      7      4      6      9      9

A)-0.17x + 5.48

B)0.17x + 5.48

C)5.48x + 0.17

D)-5.48x + 0.17

Question 12

A data set whose original x values ranged from 137 through 150 was used to general a regression equation of ŷ=-4.5x + 51. Use the regression equation to predict the value of y when x=145.

A)-703.5

B)Meaningless result

C)-619.5

D)-601.5

Question 13

If the linear correlation coefficient is 0.661, what is the value of the coefficient of determination?

A)1.322

B)-0.437

C)0.437

D)0.661

Question 14

If the linear correlation coefficient is -0.654, what is the value of the coefficient of determination?

A)-0.428

B)0.308

C)0.654

D)0.428

Question 15

If the coefficient of determination is 0.184, what percentage of the data about the regression line is explained?

A)3.39%

B)36.8%

C)24.2%

D)18.4%

 

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