Question: Use the data in Exercise 26 of Section 7.1. a. Construct a scatterplot and, based on visual inspection, draw the best-fit line by eye. b.

Use the data in Exercise 26 of Section 7.1.
a. Construct a scatterplot and, based on visual inspection, draw the best-fit line by eye.
b. Briefly discuss the strength of the correlation. Estimate or compute r and r2. Based on your value for r2, identify how much of the variation in the variable can be accounted for by the best-fit line.
c. Identify any outliers on the scatterplot and discuss their effects on the strength of the correlation and on the best-fit line.
d. For this case, do you believe that the best-fit line gives reliable predictions outside the range of the data on the scatterplot? Explain.

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a b The correlation is very strong The actual value of r is 0940 and ... View full answer

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