Number 12.

12. (This example was introduced in mpter 3.) The 10% myth study discussed in this chapter measured the beliefs of both psychology majors and nonpsychology majors. The 39 non psychology majors in this study provided the following values for the brain power variable: 8. Calculate the variance (52) and standard deviation (5) of the estimates using either the definitional or the computational formulas. (Note: From Chapter 3, you may have already calculated the number of scores (N), sum of scores squared ((2)02), the sum of squared scores (2X2), and the mean()()) Non Estimated Non Estimated Non Estimated Psychology Psychology Brain Psychology Brain Major Brain Major Power Major Power Power 1-uunw z suunnw 4n-nnm slunum su-nus 7unn-w Baum-w 9 10 22 5 5 10 10 23 15 60 11 35 24 37 10 12 5 25 38 5 15 26 30 39 15