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Fall2011Exam12versions

# Fall2011Exam12versions - Fall 2011 FORM F Name Last First...

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Questions 5 – 7 refer to the following: Suppose a sample of 50 randomly selected students were asked the number of ‘tweets’ they made yesterday. The results were as follows: # of “tweets” Frequency 0 17 1 9 2 3 4 4 5 5 3 6 2 5. The average and standard deviation are: A. Average = 1.76, standard deviation = 1.7907 B. Average = 1.76, standard deviation = 1.7727 C. Average = 3, standard deviation = 2.16 D. Average = 2, standard deviation = 2 6. A histogram of the data will be A. Skewed left B. Skewed right C. Bimodal D. Symmetric 7. What percent of the students sent at least 4 ‘tweets’? A. 20%
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Fall2011Exam12versions - Fall 2011 FORM F Name Last First...

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