# spss assignment 4

Feb 3rd, 2012
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Part A. Dependent t test For this assignment, we are interested in finding out whether participation in a creative writing course results in increased scores of a creativity assessment. For this part of the activity, you will be using the data file “Activity 4a.sav”. In this file, “Participant” is the numeric student identifier, “CreativityPre” contains creativity pre-test scores, and “CreativityPost” contains creativity post-test scores. A total of 40 students completed the pre-test, took the creativity course, and then took the post-test. Exploratory Data Analysis/Hypotheses Perform exploratory data analysis on CreativityPre and CreativityPost. Using SPSS, calculate the mean and standard deviation of these two variables. Construct an appropriate chart/graph that displays the relevant information for these two variables. Write the null and alternative hypotheses used to test the question above (e.g., whether participation in the course affects writing scores). Comparison of Means Perf

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Answer1. Exploratory Data Analysis/Hypothesesa. Descriptive StatisticsNMeanStd. DeviationCreativity pre-test4040.158.304Creativity post-test4043.359.598Valid N (listwise)40b. Bar chart representing mean pre-post test scorec. Null hypothesis: participation in the course does not affect writing scoresAlternative Hypothesis: participation in the course affects writing scores.2. Comparison of Meansa. Paired Samples StatisticsMeanNStd. DeviationStd. Error MeanPair 1Creativity pre-test40.15408.3041.313Creativity post-test43.35409.5981.518Paired Samples CorrelationsNCorrelationSig.Pair 1Creativity pre-test & Creativity post-test40.650.000Paired Samples TestPaired DifferencesMeanStd. DeviationStd. Error MeanPair 1Creativity pre-test - Creativity post-test-3.2007.5761.198Paired Samples TestPaired DifferencesT95% Confidence Interval of the DifferenceLowerUpperPair 1Creativity pre-test - Creativity post-test-5.623-.777-2.671Paired Samples TestdfSig. (2-tailed)Pair 1Creativity pre-test - Creativity post-test39.011b. The paired sample t-test analysis indicates that mean score of Creative post test score (M=43.35) is significantly greater as compare to Creative pre test score (M=40.15). The results also indicate that there is positive correlation between these two variables (r = 0.650, p<0.001).As P value (P=0.011) is less than 0.05, so we reject null hypothesis & conclude that participat

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