Oishi and Shigehiro (2010) report that people who move from home to home frequently as children tend to have lower than average levels of well-being as adults. To further examine this relationship, a psychologist obtains a sample of n = 12 young adults who each experienced 5 or more different homes before they were 16 years old. These participants were given a standardized well-being questionnaire for which the general population has an average score of µ = 40. The well-being scores for this sample are as follows: 38, 37, 41, 35, 42, 40, 33, 33, 36, 38, 32, 39. a) On the basis of this sample, is well-being for frequent movers significantly different from well-being in the general population? Use a two-tailed test with = .05. b) Compute Cohen’s d to measure the size of the difference. c) Write a sentence showing how the outcome of the hypothesis test and the measure of effect size would appear in a research report
Oishi and Shigehiro (2010) report that people who move from home to home frequently as
children tend to have lower than average levels of well-being as adults. To further examine this
relationship, a psychologist obtains a sample of n = 12 young adults who each experienced 5 or
more different homes before they were 16 years old. These participants were given a
standardized well-being questionnaire for which the general population has an average score of
µ = 40. The well-being scores for this sample are as follows: 38, 37, 41, 35, 42, 40, 33, 33, 36, 38,
32, 39.
a) On the basis of this sample, is well-being for frequent movers significantly different
from well-being in the general population? Use a two-tailed test with = .05.
b) Compute Cohen’s d to measure the size of the difference.
c) Write a sentence showing how the outcome of the hypothesis test and the measure
of effect size would appear in a research report.
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