Question;University of Phoenix MaterialWeek Four Practice ProblemsPrepare a written response to the following questions.Chapter 7The;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)SphereScaleRangeWorkHomeWork vs. homeImportant0-95.985.066.86***Attention0-188.8.131.52***Challenge0-94.112.4111.49***Choice0-94.284.74-3.38***Wish doing else0-91.51.440.61Hurried0-31.81.393.21**Social Anxiety0-30.810.643.17**Affect1-74.844.98-2.64**Social Climate1-75.645.954.17***Note: Values for column 3 are tscores, df = 90 for all ttests.**p<.01***p<.001Chapter;812. Barker and colleagues (2012) compared 61 parents fo children;who had a serious mental illness (SMI) to 321 parents of children withour 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 ttest 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;Mean;SD;Mean;SD;t;p;Stress;Number of stressors;0.65;0.56;0.42;0.37;-3.08;0.00;Stress severity sum;1.89;1.63;1.16;1.1;-3.3;0.00;Cortisol (nmol/L);Wake;17.46;10.72;16.75;7.38;-0.14;0.90;Out of bed;22.83;11.48;24.19;10.59;1.13;0.26;Bed;5.72;8.56;4.22;5.57;-1.86;0.06;Cortisol awakening response;5.62;9.7;7.48;8.34;1.55;0.12;Decline from out of bed;17.13;11.35;20.11;10.71;1.97;0.05;Medication use (proportion);Allergy;0.26;0.44;0.16;0.37;-1.71;0.09;Steroid;0.2;0.4;0.12;0.33;-1.32;0.19;Hormone;0.13;0.34;0.14;0.35;0.25;0.80;Anxiety or depression;0.26;0.44;0.12;0.33;-2.36;0.02;14. For each of the following;studies, say whether you would use a t test for dependent means or a t test for;independent means.;a. 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.;b. 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.;c. 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.;Chapter 9;23. 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 4.21**;Extroversion 14 13 15 13 2.05;Maturity 15 15 22 19 3.11*;Self-Confidence 38 42 27 32 3.58*;*p <.05, **p <.01;24. Rosalie Friend (2001), and;educational psychologist, compared three methods of teaching writing. Students;were randomly assigned to three different experimental conditions involving;different methods of writing a summary. At the end of the two days of;instructions, participants wrote a summary. One of the ways it was scored was;the percentage of specific details of information it included from the original;material. Here is a selection from her article describing one of the findings;The effect of summarization method on inclusion of important information was;significant F(2, 144) = 4.1032, p <.019. The mean scores (with standard;deviations in parantheses) were as follows: Argument Repetition, 59.6% (17.9);Generalization, 59.8% (15.2), and Self-Reflection, 50.2% (18.0). (p.14);a. Explain these results to a person who has never had a course in statistics.;b. Using the information in the preceding description, figure the effect size;for the study.
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