11.4. You have the following six Hedges’ g effect sizes and associated standard errors: g se
0.23 0.32 0.25 0.31 0.08 0.11 0.10 0.26 0.20 0.17 0.22 0.24 (a) Calculate the fixed-effect mean effect size. (b) Calculate the standard error of the mean effect size. (c) Construct a 95% confidence interval around the mean effect size. (d) Compute Q and I 2 and interpret.