In Research Example 11.1, you learned of a study by Wright et al. (2008) in which researchers set out to determine whether multiple homicide offenders (MHOs) were diverse in the number and types of crime they commit or whether, instead, they tend to specialize in killings. The researchers compared MHOs to single homicide offenders (SHOs) for purposes of this study. MHOs (Sample 1; N=155) had a mean diversity index score of .36 (s=.32) and SHOs (Sample 2; N=463) had a mean of .37 (s=.33). Using an alpha level of .05, test the hypothesis that the two groups' means are significantly different. Assume equal population variances. For Step 3: Find the critical value. What is the critical value? Question 10 options: -1.960 1.645 1.960 1.645