Refer to exercise 21, where data on production volume and cost were used to develop an estimated regression equation relating production volume and cost for a particular manufacturing operation. Use α...

Refer to exercise 21, where data on production volume and cost were used to develop an

estimated regression equation relating production volume and cost for a particular manufacturing operation. Use α = .05 to test whether the production volume is significantly

related to the total cost. Show the ANOVA table. What is your conclusion?

30. Refer to excercise 5 where the following data were used to investigate whether higher

prices are generally associated with higher ratings for elliptical trainers (Consumer

Reports, February 2008).

With x =price ($) and y = rating, the estimated regression equation is yˆ = 58.158

+.008449x. For these data, SSE = 173.88 and SST =756. Does the evidence indicate a significant relationship between price and rating?