Using the information from question 58, construct a 90 % confidence interval for b.

Question 58

Suppose a researcher is interested in the relationship between the dollar volume of sales and the number of miles customers live from the store. She collects data on dollar volume of sales per customer (y) and the miles a customer lives from the store (x) for 28 customers. The following relationship is then estimated:

(a) Interpret the meaning of the slope coefficient.

(b) Test whether the slope coefficient is significant at the 95 % level of confidence.

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= 75-85x Sb= .32 n = 28