Problems 11-13 will use the KidsFeet data from the mosaicData package. We will look at the variables length,

which is the length of the longer foot (in cm), and width, which is the width of the longer foot (in cm). Let

the explanatory variable be length and response variable be width.

11. What is the correlation coefficient of this data?

a. -0.3050785

b. 0.6410961

c. 0.4110041

d. 0.0030158

e. none of these

12. What is the coefficient of determination for this data?

a. -0.3050785

b. 0.6410961

c. 0.4110041

d. 0.0030158

e. none of these

13. What is the least squares regression equation?

a. y = 18.5930454 + 0.2479478x

b. y = 2.8622761 + 0.2479478x

c. y = -31.9892567 + 1.6576239x

d. y = -31.9892567 + 1.0626962x

e. none of these