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A researcher is doing applied research on preventing falls in the elderly. He wants to run an experiment on the impact of a series of Wii (computer assisted) exercises on the balance ability of elderly residents of an assisted living facility. He randomly assigns half his participants to engage in the Wii program for six weeks and the other half to engage in traditional balance promoting exercises. It will be important that the two groups have equal spatial ability before he runs the experiment. Using the Analysis Toolpak in Excel calculate the descriptive statistics for the experimental (Wii) group and the control (traditional exercises) group. Compare them in terms of measures central tendency, variation, skewness, and kurtosis. What do they tell you about the two groups? Spatial Ability Scores Wii Group Traditional Exercise Group 100110108103881047098821021109510410094101981211181038810689103101106969991105 4. Use the following data to produce a pivot table. Explain what it tells you. IDRisk LevelLocus of Control11A22B32B42B51A63B73B83A92B102A113B123B131A142A152B162B173B182A192B203B1 = LowA = Internal 2 = MediumB = External= High 5. For each of the following correlations report: the type of correlation (positive or negative) what the correlation means in words. (For example, in a positive correlation we could say As ____ increases, _____ increases. the general interpretation of the correlation coefficient, i.e., whether it is a very strong relationship, a moderate relationship, a weak relationship, etc. The correlation between grades in basic math and advanced math classes at a small liberal arts college where r = +.78. The correlation between reading ability and social science grades in a middle school where r = +.52. The correlation between test anxiety scores and grade on an achievement test where r = -.42. The correlation between math aptitude scores and musical aptitude scores in second graders where r = +.28. The correlation between the number of books read over a year and the scores on a popular video game where r = -.38. 6. A researcher in animal behavior was interested increasing veterinarian care for dogs. He was particularly interested in the effect of the time spent in the waiting room of a vets office on the dogs heart rate when first taken in the examination room. Use the following data to: compute a correlation coefficient using Excel. create a scatterplot using Excel. explain in words what the correlation coefficient tells you about the relationship between time in the waiting room and heart rate. What does it not tell you? Time in Waiting Room Heart Rate 14 116 15 104 10 102 21 98 11 103 16 114 12 116 18 90 16 103 10 123 7. Which type of correlation would be appropriate to calculate for each of the following sets of data? Correlating gender and whether one is a college graduate (yes/no) Correlating rank in a graduating class (1st, 2nd, 3rd, etc.) and score on a test of optimism Correlating gender and score on a test of optimism. 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