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 individuals 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 = 16 participants with 2 or fewer negative experiences, 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 = 370. Is there a significant difference between the two populations represented by these two samples? Use a two-tailed test with α = .01 [use the 4-step procedure]. [Remember to assess whether the assumption of homogeneity of variances is satisfied or not, alpha = .01 for homogeneity test]. Compute Cohen’s d to measure the size of the effect.
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 individuals 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
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- Is there a significant difference between the two populations represented by these two samples? Use a two-tailed test with α = .01 [use the 4-step procedure]. [Remember to assess whether the assumption of homogeneity of variances is satisfied or not, alpha = .01 for homogeneity test].
- Compute Cohen’s d to measure the size of the effect.
- Report your hypothesis test results and cohen’s d in APA format
- Is there a significant difference between the two populations represented by these two samples? Use a two-tailed test with α = .01 [use the 4-step procedure]. [Remember to assess whether the assumption of homogeneity of variances is satisfied or not, alpha = .01 for homogeneity test].
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