It was hypothesized that the number of bottles of craft beer sold per evening in the restaurants of a city depends linearly on the average costs of meals in the restaurants. The following results were obtained for a sample of
n = 17 restaurants, of approximately equal size, where
y = number of bottles sold per evening
x = average cost, in dollars, of a meal

Compute a 95% prediction interval and a 95% confidence interval for the number of bottles of beer sold when the average cost of a meal is $27.

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-25.5 y= 16.0 1-1 = 350 1n 1 Σ(xi-x)(yi-y) -1