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University of Phoenix Material Week Four Practice Problems




Question;University of Phoenix Material;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 ttest 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.;References;Copyright ?2013 by Pearson Education, Inc.;All rights reserved. Used with permission


Paper#60501 | Written in 18-Jul-2015

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