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PSY 870: Module 5 Problem Set - Document preview page 1

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PSY 870: Module 5 Problem Set

This solved assignment covers statistical and research problems in psychology.

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PSY 870: Module 5 Problem Set - Page 1 preview imageCollege of Doctoral StudiesPSY 870:Module5Problem SetAnxiety and CountryThis study examined differences in anxiety level between an industrial countryand anonindustrial country. Anxiety is assessed three wayscognitive, affective, andbehavioralwith higher scores indicating higher levels of the anxiety dimensions.Directions:Using the SPSS data file forModule 5(locatedin Topic Materials),answerthe followingquestions.NOTE: Helpful hints are provided here for you to use while answering thesequestions.1.What is the ONE independent variable in this study?What are the dependent variables?2.Why is a one-way between-subjects MANOVA appropriate to use for this researchdesign?HINT:Consider the number of IVs and the number of DVsfor your answer.3.Did you find any errors that the researcher made when setting up the SPSS data file(don’t forget to check the variable view)?If so, what did you find? How did you correctit?HINT:YES! The Measures (for scale of measurement) is wrong for each of the 4 variables!Youneed toindicate what was wrong and what should be the correct measures.4.Perform Initial Data Screening.What did you find regarding missing values, univariateoutliers, multivariate outliers, normality? Although you are not asked to makeadjustments, what should you consider when you find these kinds of outcomes?HINTS:For missing values, see Case Processing SummaryUnivariate outliers: inspect boxplotsMultivariate outliers: Don’t forget to create the Case ID variable to do thisanalysis.Then, perform a regression analysis with CaseID as the DV andCountry as the IV in order to compute the Mahalanobis distance measures. Besure to click Save when you are setting up the regression so the regression scores
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PSY 870: Module 5 Problem Set - Page 3 preview image© 2013. Grand Canyon University. All Rights Reserved.will be saved to a new variable (automatically named MAH_1). Then, ExploreMAH_1 scores, remembering to check the “Outliers” box that is found with Plots.This will give you information about multivariate outliers.Normality:Examine the skewness and kurtosis values for each dependent variable:Examining the histogramsExamine the Shapiro-Wilks’ results5.Perform a one-way between-subjects MANOVA on the data. Before interpreting theresults of the MANOVA, check outcomes that test other assumptions for this statistic:equality of covariance matrices (see Box’s Test) and sufficient correlation among theDVs (see Bartlett’s Test of Sphericity). Also check the results of the Levene’s Test ofEquality of Error Variances to evaluate that assumption for the univariate ANOVAs thatare run and show in the Tests of Between-Subjects Effects output. What have you foundabout whether the data meet these additional assumptions for the MANOVA andfollowup ANOVAs?HINTS:Be sure to read the instructions very carefully in the textbook for what to check toget these results for these tests of assumptions (e.g., you have to check ResidualSSCP matrix within Options to get the results of the Bartlett’s Test of Sphericity).Be sure to review what a statistically significant outcome means for each test: insome cases, it means a violation, but in others it means an assumption is met.Solution:SPSS Output for above question is given below:
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