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 5: Make a decision about the null hypothesis and draw a conclusion. Select the two answers that apply. Question 4 options: Since |tobt| is greater than 1.960, the null is rejected. There is no difference between MHOs and SHOs in the diversity of the crimes they commit. There is a difference between MHOs and SHOs in the diversity of the crimes they commit. Since |tobt| is not greater than 1.960, the null is retained