standard deviation
Calculate the mean and standard deviation for this data set: 250, 300, 300, 325, 325, 350, 350, 350, 350, 375, 400, 425, 425, 450, 450, 500 (Note: When computing go out to three decimal places and remember to use n – 1 rather than n).
M = 370.313
M = 380.313
M = 370.343
M = 470.373
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Calculate the standard deviation for this data set: 250, 300, 300, 325, 325, 350, 350, 350, 350, 375, 400, 425, 425, 450, 450, 500 (Note: When computing go out to three decimal places and remember to use n – 1 rather than n).
SD = 66.795
SD = 56.596
SD = 66.595
SD = 36.495
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How many books are above the mean?
9
7
5
4
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How many are below the mean?
9
7
5
4
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How many books are within one standard deviation of the mean?
11
10
8
7
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What percent of the data is more than one standard deviation above the mean?
33.56%
35.76%
43.57%
43.75%
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Provide the z score for a book with an original number of pages of 425. (Round to three decimal places)
0.305
0.821
-1.807
0.680
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Provide the z score for a book with an original number of pages of 300. (Round to three decimal places)
-1.056
0.680
-1.807