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UOP PSY315 week 4 problems

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Question;Week Four;Practice Problems;Prepare a written response to the following;questions.;Chapter 7;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;0-9;5.98;5.06;6.86***;Attention;0-9;6.15;5.13;7.96***;Challenge;0-9;4.11;2.41;11.49***;Choice;0-9;4.28;4.74;-3.38***;Wish doing else;0-9;1.5;1.44;0.61;Hurried;0-3;1.8;1.39;3.21**;Social Anxiety;0-3;0.81;0.64;3.17**;Affect;1-7;4.84;4.98;-2.64**;Social Climate;1-7;5.64;5.95;4.17***;Note: Values for column 3 are tscores;df = 90 for all ttests.;**p<.01;***p<.001;Chapter 8;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 ttest 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;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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