Dr Guidry Conducts a Study Examining the Relationship Between the Number

question 31

Multiple Choice

Dr. Guidry conducts a study examining the relationship between the number of friends one has and the experience of daily stress and life satisfaction. She randomly samples 1,500 elderly men and women in Nashville, Tennessee (the state capital) , located in the southern United States. Below are her findings.
•Life satisfaction and experience of daily stress: r = −.57 (p = .01)
•Number of friends one has and experience of daily stress: r = .09, not sig.
•Number of friends one has and life satisfaction: r = .36 (p = .04)
Comparing all three correlations, Dr. Guidry will be most able to accurately predict life satisfaction from the experience of daily stress because the relationship:

• A)is negative.
• B)has the largest effect size.
• C)was reported first.
• D)was statistically significant.

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Definitions:

Error of Estimation

The difference between an estimated value and the true value, reflecting the degree to which an estimation method may deviate from accuracy.

P-value

The probability of observing a test statistic as extreme as, or more than, the value observed under the assumption that the null hypothesis is true.

Pilots' Union

An organization representing the collective interests of pilots, often focused on negotiating wages, working conditions, and other employment matters.

Null Hypotheses

A hypothesis used in statistical testing that assumes no effect or no difference between treatments or groups.