The following data (Exercise 12 18 and data set EX1218) were obtained in an experiment relating the dependent variable, y (texture of strawberries), with x (coded storage temperature) Use the information from Exercise 12 18 to answer the following questions a What is the best estimate of Iuml 2, the variance of the random error b Do the data indicate that texture and storage temperature are linearly related Use a 05 c Calculate the coefficient of determination, r2 d Of what value is the linear model in increasing the accuracy of prediction as compared to the predictor, x 2 2 022 y 4 0 3 5 2 0 0 5 0 0

Question: The following data (Exercise 12.18 and data set EX1218) were obtained in an experiment relating the dependent variable, y (texture of strawberries), with x (coded

The following data (Exercise 12.18 and data set EX1218) were obtained in an experiment relating the dependent variable, y (texture of strawberries), with x (coded storage temperature). Use the information from Exercise 12.18 to answer the following questions:

a. What is the best estimate of Ïƒ2, the variance of the random error?
b. Do the data indicate that texture and storage temperature are linearly related? Use a = .05.
c. Calculate the coefficient of determination, r2.
d. Of what value is the linear model in increasing the accuracy of prediction as compared to the predictor, ?

x -2 -2 022 y 4.0 3.5 2.0 0.5 0.0

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