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July 6, 2015

Homework Help: statistics

Posted by Mandy on Sunday, January 27, 2013 at 6:44pm.

For a particular sample of 53 scores on a psychology exam, the following results were obtained.
First quartile = 44 Third quartile = 68 Standard deviation = 8 Range = 55
Mean = 54 Median = 54 Mode = 71 Midrange = 64

I. What score was earned by more students than any other score? Why?
II. What was the highest score earned on the exam?
III. What was the lowest score earned on the exam?
IV. According to Chebyshev's Theorem, how many students scored between 30 and 78?
V. Assume that the distribution is normal. Based on the Empirical Rule, how many students scored between 22 and 86?
Please show all of your work.

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