Chapter 9, Problem 22P

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8th Edition

Frederick J Gravetter + 1 other

ISBN: 9781133956570

Textbook Problem

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 wellbeing in the general population? Use a two-tailed test with α = .05.

**b.** Compute the estimated 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.

**a.**

To determine

**To Find:** If well-being for a frequent mover significantly different than that of general population using two-tailed test with

Explanation

The sample of 12 individual is selected from a population with mean 40. Two-tailed hypothesis test using

**Calculations:**

Step 1: Null Hypothesis is

Step 2: For a sample of

Step 3: t-statistics can be calculated using formula:

**Software procedure:**

Step-by-step procedure to obtain the sample mean and standard error,

- Go to
**Variable View>**Enter the name of the variable as**Sample.** - Go to
**Data View**>Enter the values of**Samples.** - Choose
**Analyze > Descriptive Statistics>**choose**Descriptive.** - Select
**Sample**and move it under**variable(s)>**Choose**Options>**Select**Mean and S.E.mean** - Choose
**Continue**> choose**OK.**

Output using the SPSS software is given below:

**b.**

To determine

**To Find:** The Cohen’s d for the given question.

**c.**

To determine

**To State:** How would the outcome of hypothesis test and measure of effect size will appear in the research report.

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