A manager at an ice cream store is trying to determine how many customers to expect on any given day. Overall business has been relatively steady over the past several years, but the customer count seems to have ups and downs. He collects data over 30 days and records the number of customers, the high temperature (degrees Fahrenheit), and whether the day fell on a weekend (1 equals weekend, 0 otherwise). A portion of the data is shown in the accompanying table; the entire data set, labeled Ice_Cream, can be found on the text website.

a. Estimate: Customers = β0 + β1Temperature + β2Weekend + .
b. How many customers should the manager expect on a Sunday with a forecasted high temperature of 808?
c. Interpret the estimated coefficient for Weekend. Is it significant at the 5% level? How might this affect the store’s staffingneeds?

Customers 376 433 Temperature 75 78 Weekend 401 68