Question 16If the coefficient of determination is 0.394, what percentage of the data about the regression

line is unexplained?

A)15.5%

B)60.6%

C)66.0%

D)39.4%

Question 17

What is the primary difference between a simple linear regression and a multiple linear regression?

A)The coefficient of determination is above 0.5

B)There is more than one dependent variable

C)There is more than one independent variable

D)The correlation coefficient is above 0.5

Question 18

The equation used to predict how tall a dog will be as an adult is ŷ=4.5 + 0.7×1 + 0.55×2, where x1 is the height of the mother and x2 is the height of the father. Use this equation to predict the height of a puppy whose mother is 45.2 inches tall and whose father is 41.6 inches tall.

A)59.02 inches

B)43.4 inches

C)54.52 inches

D)58.48 inches

Question 19

The equation used to predict how long it will take to receive a package through the mail is ŷ=0.5 + 0.02×1 + 0.85×2

days, where x1 is the distance to travel and x2 is the weight of the package. Use this equation to predict the how long it will take to receive a package that is 145 miles away and weighs 3.8 pounds.

A)6.6 days

B)74.4 days

C)16.1 days

D)123.8 days

Question 20

The equation used to predict how long a cold will last is ŷ=-1.8 + 0.09×1 + 3.2×2 – 1.9×3, where x1

is person’s temperature on the first day, x2 is number of people seen each day, and x3 is the amount of sleep the person gets. Use this equation to predict how long a cold will last with a temperature of 100.4 degrees, an average of 4 people seen each day, and 6 hours of sleep.

A)7.0 days

B)8.6 days

C)12.3 days

D)10.5 days

 

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