Here are the data from the small bookstore we saw in chapter 15, Exercise,

The regression line is:
Sales = 8.10 + 0.913 number of sales people working and we can assume that the assumptions and conditions for regression are met. Calculations with technology find that se = 1.477.
a) Find the predicted sales on a day with 500 employees working.
b) Is this prediction likely to be useful? Explain.

Transcribed Image Text:

Number ef Sales People Working Sales(in $1000) 13 14 10 10 12 15 16 20 20 20 26 y = 17.6 D(y) 5.34 10.4 so(x) 564