Use these descriptive statistics to find the power for this study. Please show your hand calculations:

M1 = 66.0, s1 2 = 45.0, n1 = 36 for people who chose surgery to change their appearance and M2 = 63.0, s2 2 = 49.0, n2 = 84 for those who choose surgery for a physical reason

1.) First find s2 pooled.

2.) Then find g (the sample estimate of d - remember to take the square root of s2 pooled).

Always use the absolute value of g (or d) for these calculations.

3.) Find , remembering to replace d with g.

4.) Find the harmonic mean of the n's because you have unequal sample sizes. Assuming = .05 (two tailed), use the table to find the power