In Exercise 9 we saw a regression to predict the sales per person at a movie theater in terms of the time (in minutes)

before the show. The model was:

a) A 90% prediction interval for a concessions customer 10 minutes before the movie starts is ($4.60, $9.30). Explain how to interpret this interval.

b) A 90% confidence interval for the mean of sales per person 10 minutes before the movie starts is ($6.65, $7.25).
Explain how to interpret this interval.

c) Which interval is of particular interest to the concessions manager? Which one is of particular interest to you, the moviegoer?

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= Sales 4.3 +0.265 Minutes.