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# In Galton's height data (Figure 7.1, in Section 7.1), the

ISBN: 9780073401331 38

## Solution for problem 5E Chapter 7.2

Statistics for Engineers and Scientists | 4th Edition

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Problem 5E

In Galton's height data (Figure 7.1, in Section 7.1), the least-squares line for predicting forearm length (y) from height (x) is y = -0.2967 + 0.2738x.

a. Predict the forearm length of a man whose height is 70 in.

b. How tall must a man be so that we would predict his forearm length to be 19 in.?

c. All the men in a certain group have heights greater than the height computed in part (b). Can you conclude that all their forearms will be at least 19 in. long? Explain.

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