13.15 Exercise 13.10 presented y 5 hardness of molded plastic and x 5 time elapsed since the molding was completed.

Summary quantities included

a. Calculate the estimated standard deviation of the statistic b.

b. Obtain a 95% confidence interval for

b, the slope of the population regression line.

c. Does the interval in Part

(b) suggest that b has been precisely estimated? Explain.

Transcribed Image Text:

n = 15 b = 2.50 SSResid = 1235.470 (x)=4024.20