Descriptive statistics and mean-level comparisons

Reference no: EM13782733

Part -1:

The table below shows ratings of various aspects of work and home life of 100 middle-class men in India who were fathers. Pick three rows of interest to you and explain the results to someone who is familiar with the mean, variance, and Z scores, but knows nothing else about statistics.

Comparison of Fathers' Mean Psychological States in the Job and Home Spheres (N = 100)

Sphere

Scale

Range

Work

Home

Work vs. home

Important

Part -2:

Barker and colleagues (2012) compared 61 parents for children who had a serious mental illness (SMI) to 321 parents of children without such an illness. The researchers examined the parents' reported levels of stress, their levels of a hormone called cortisol (levels of this hormone provide an indication of chronic stress), and their use of several types of medication. The table below shows the results of the study. Focusing on the parents' number of stressors (the first row of the table) and the parents' use of medications for anxiety or depression (the last row in the table), explain these results to a person who knows about the t test for a single sample but is unfamiliar with the t test for independent means.

Descriptive Statistics and Mean-Level Comparisons

SMI Parents

Comparison Parents

N = 61

N = 321

For each of the following studies, say whether you would use at test for dependent means or a t test for independent means.

A researcher measures the heights of 40 university students who are the firstborn in their families and compares the 15 who come from large families to the 25 who come from smaller families.

A researcher tests performance on a math skills test of each of 250 individuals before and after they complete a one-day seminar on managing test anxiety.

A researcher compares the resting heart rate of 15 individuals who have been taking a particular drug to the resting heart rate of 48 other individuals who have not been taking the drug.

Part -3:

An experiment is conducted in which 60 participants each fill out a personality test, but not according to the way the participants see themselves. Instead, 15 are randomly assigned to fill it out according to the way they think theur mothers see them (that is, the way they think their mothers would fill it out to describe the participants); 15 as their fathers would fill it out for them; 15 as their best friends would fill it out for them; 15 as the professors they know best would fill it out for them. The main results appear in Table 9-17. Explain these results to a person who has never had a course in statistics.

Means for Main Personality Scales for Each Experimental Condition

Scale

Mother

Father

Friend

Professor

F(3, 56)

Conformity

24

21

12

16

Extroversion

14

13

Reference no: EM13782733

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