Assignment9new

Assignment9new - Name:_ Psychology1167 Assignment9...

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Name:________ Psychology 1167 Assignment 9 Due date: 12/7/10 SHOW YOUR WORK. You are the teacher of a small stats class. All your students’ exam grades are as follows: Exam 1 Exam 2 71.56 76.78 77.68 71.50 75.32 79.34 83.39 72.28 79.89 77.61 68.31 70.95 73.81 56.78 85.48 65.20 69.31 78.63 68.91 93.19 78.60 83.51 76.05 69.86 79.86 86.55 82.93 89.67 85.40 88.38 84.88 82.28 82.35 89.85 96.13 86.76 85.38 83.54 83.29 96.95 92.42 81.33 85.31 87.68 82.81 89.56 81.61 90.84 78.79 84.83 Part 1. For both exam 1 and exam 2, do the following: 1. What kind of variables are these? Answer completely.
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2. Calculate the mean, median, and mode. (3 points) 3. Assess the skewness of these data. (1 point) Which measure of central tendency is best to use in this situation? (1 point) 4. Create a cumulative frequency distribution for each. (5 points) 5. Create a histogram for each. (3 points) 6. Calculate the SS x , variance and standard deviation for these exams. Include all units of measurement. (3 points)
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This note was uploaded on 03/26/2011 for the course PSYCH 1167 taught by Professor Bingshi during the Spring '10 term at Temple.

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Assignment9new - Name:_ Psychology1167 Assignment9...

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