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Enter your answers in the spaces provided. Save the file using your last name as the beginning of the file name (e.g., ruf_week1_exercises) and submit via ?Assignments.? When appropriate, show your work. 1. Find the mean, median, and mode for the following sample of scores: 2,3,3,1,2,5,2,3,4,2 2. A sample of n=8 scores has a mean of 6. What is the value of ?X for this sample? 3. A population of N=10 scores has a mean of ?=24. If one person with a score of X=42 is removed from the sample, what will be the value for the new mean? 4. For the data in the following sample: 8, 1, 5, 1, 5 a. Find the mean and the standard deviation b. Now change the score of X=8 to X=18, and find the new mean and standard deviation. c. Describe how one extreme score influences the mean and the standard deviation 5. A recent study reports that older adults who got regular physical exercise (as measured by a pedometer) experienced fewer symptoms of depression, even when tested 2 years later. Following are hypothetical data similar to the results obtained in this study. a. Calculate the mean and standard deviation for each group of scores b. Based on the statistics from part a, does there appear to e a difference between the two groups? Regular Exercise No regular exercise 1 5 3 4 4 6 3 3 5 5 2 7 3 6 4 6

Paper#13199 | Written in 18-Jul-2015

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