Simple Linear Regression — Test

Question 1

Based on the scatterplot and computer output, a reasonable estimate for the stock price for week 95 is:

Revolt · Accepted Answer

185 point 0 5 dollars because widehat log y is equal to 0 point 0 0 2 2 repeating 95 plus 2 point 0 5 8 3 is equal to 2 point 2 6 7 3 and 10 raised to the 2 point 2 6 7 3 power is equal to 185 point 0 5 .

Question 2

Using the computer output, what is the correlation?

Revolt · Accepted Answer

0 point 7 9 4

Question 3

Based on the scatterplot and the residual plot, is a linear model appropriate for predicting the Short Program score from the Free Skate score?

Revolt · Accepted Answer

A linear model is appropriate because the scatterplot is roughly linear, and the residual plot does not show a clear pattern.

Question 4

Based on the residual plot, is the linear model appropriate?

Revolt · Accepted Answer

Yes, there is no clear pattern in the residual plot.

Question 5

Which of the following is an accurate description of the scatterplot?

Revolt · Accepted Answer

The expected yield of a crop is low whenever the number of seeds planted per square foot is small or large. A larger yield is expected when the number of seeds per square foot is around 60.

Simple Linear Regression — Test Answers

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