to between the two types of high school student. 8. It appears that there is some truth to the old adage "That which doesn't kill us makes us stronger." Seery, Holman, and Silver (2010) found that indi- viduals with some history of adversity report better mental health and higher well-being compared to people with little or no history of adversity. In an attempt to examine this phenomenon, a researcher surveys a group of college students to determine the negative life events that they experienced in the past 5 years and their current feeling of well-being. For n = 18 participants with 2 or fewer negative experi- ences, the average well-being score is M = 42 with SS = 398, and for n = 16 participants with 5 to 10 negative experiences the average score is M = 48.6 with SS a. Is there a significant difference between the two populations represented by these two samples? Use a two-tailed test with a = .01. 370. Samples b. Compute Cohen's d to measure the size of the effect. c. Write a sentence demonstrating how the outcome of the hypothesis test and the measure of effect size would appear in a research report. 9. Does posting calorie content for menu items affect people's choices in fast food restaurants? Accord- ing to results obtained by Elbel, Gyamfi, and Kersh (2011), the answer is no. The researchers monitored the calorie content of food purchases for children and adolescents in four large fast food chains before and after mandatory labeling began in New York City. Although most of the adolescents reported noticing the calorie labels, apparently the labels had no effect on their choices. Data similar to the resuitS obtained show an average of M = 786 calories per meal with of M = 786 calories per meal with S = 85 forn D 100 children and adolesceeis before the labeling, compared to an average of M = 772 calories with s = 91 for a similar sample after the mandatory nosting 100 a.