Question

Attempting to analyze the relationship between advertising and sales, the owner of a furniture store recorded the monthly advertising budget X (in $thousands) and the sales Y (in $millions) for a sample of 12 month. The data are listed here.

Advertising	23	46	60	54	28	33	25	31	36	88	90	99
Sales	9.6	11.3	12.8	9.8	8.9	12.5	12	11.4	12.6	13.7	14.4	15.9

Estimate with 90% confidence the mean sales when advertising budget is 90000.

(You may convert 90,000 to values in $thousands for X)

Answer 1

Solution :

Using Minitab technolgy, the regression analysis output for 90% confidence interval for mean sales when advertising budget is x =90 ('000).

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