A researcher studied the flexibility of 10 women in an aerobic exercise class, 10 women in a

Question:

A researcher studied the flexibility of 10 women in an aerobic exercise class, 10 women in a modern dance class, and a control group of 9 women. One measurement she made on each woman was spinal extension, which is a measure of how far the woman could bend her back. Measurements were made before and after a 16-week training period. The change in spinal extension was recorded for each woman. Summary statistics are given in the following table.8 The ANOVA SS(between) is 7.04 and the SS(within) is 15.08.

(a) Dotplots of these data are shown below. Based on the dotplots, does it appear that the null hypothesis is true? Why or why not?
(b) State the null hypothesis in symbols.
(c) Construct the ANOVA table and test the null hypothesis. Let Î± = 0.01.