12.47 ANOVA table for leg press Exercise 12.15 referred to an analysis of leg strength for 57 female athletes, with y = maximum leg press and x = number of 200-pound leg presses until fatigue, for which yn = 233.89 + 5.27x.

The table shows ANOVA results from SPSS for the regression analysis.

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ANOVAb Sum of Model Squares df Mean Square F Sig. 1 Regression 121082.4 1 1 Residual 71704.442 55 121082.400 92.875 .000 1303.717 Total 192786.8 56 a. Show that the residual standard deviation is 36.1. Interpret it. b. For this sample, x = 22.2. For female athletes with x = 22, what would you estimate the variability to be of their maximum leg press values? If the y values are approximately normal, find an interval within which about 95% of them would fall.