1. In the example of this chapter, the coefficient of the dummy variable for restaurants (identified as Services-Eating and Drinking) is 244.06 when wholesalers define the baseline category in Table 3. e = 11 - R 2sy .)

2. If the standard deviation of the response in a regres- sion is $10,000, what value of R2 is necessary for the approximate 95% prediction interval to have margin of error of $5,000? (Use the hint from the previous question.)