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Asked Feb 14, 2020
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Regression and Predictions. Exercises 13–28 use the same data sets as Exercises 13–28 in Section 10-1. In each case, find the regression equation, letting the first variable be the predictor (x) variable. Find the indicated predicted value by following the prediction procedure summarized in Figure 10-5 on page 493.

Tips Using the bill/tip data, find the best predicted tip amount for a dinner bill of $100. What tipping rule does the regression equation suggest?

Bill (dollars)
Tip (dollars)
33.46
50.68
63.60
107.34
87.92
8.08
98.84
5.50
5.00
17.00
12.00
16.00
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Bill (dollars) Tip (dollars) 33.46 50.68 63.60 107.34 87.92 8.08 98.84 5.50 5.00 17.00 12.00 16.00

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Expert Answer

Step 1

Given bill tip data. Let bill be x and tip be y. The following calculations are made to find the regression line.

Statistics homework question answer, step 1, image 1

The general regression line equation will be in form as shown below

Statistics homework question answer, step 1, image 2

The values of b0 b1 are calculated as shown below
Statistics homework question answer, step 1, image 3

...

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