(CO 6) Two variables have a positive non-linear correlation. Does the independent variable increase or decrease as the dependent variable increases?

a) Independent variable increases

b) Independent variable decreases

c) Independent variable would remain the same

d) Cannot determine from information given

(CO 6) What would be the notation for the mean of the y values?

a) (x, y)

b) yi

c)

d) b

(CO 6) Find the regression equation for the following data set

x78594102

y41283793

a) = 0.40x + 4.08

b) = -0.40x - 4.80

c) = 0.39x - 4.80

d) = 0.39x + 4.08

(CO 6) A data set whose original x values ranged from 28 through 49 was used to generate a regression equation of = 2.9x - 34.7. Use the regression equation to predict the value of y when x=29.

a) 392.9

b) 49.4

c) Meaningless result

d) 42.1

(CO 6) A data set whose original x values ranged from 241 through 290 was used to generate a regression equation of = -0.06x + 9.8. Use the regression equation to predict the value of y when x=240.

a) 4.6

b) -4.6

c) 24.2

d) Meaningless result

(CO 6) A data set whose original x values ranged from 38 through 65 was used to general a regression equation of = -4.4x + 2.6. Use the regression equation to predict the value of y when x=55.

a) -239.4

b) 239.4

c) Meaningless result

d) 244.6

(CO 6) If the linear correlation coefficient is 0.182, what is the value of the coefficient of determination?

a) -0.033

b) -0.427

c) 0.033

d) 0.427