# Calculate the mean and standard deviation for this data set:

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

Flag this QuestionQuestion 31 pts

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

Flag this QuestionQuestion 41 pts

How many books are above the mean?

9

7

5

4

Flag this QuestionQuestion 51 pts

How many are below the mean?

9

7

5

4

Flag this QuestionQuestion 61 pts

How many books are within one standard deviation of the mean?

11

10

8

7

Flag this QuestionQuestion 71 pts

What percent of the data is more than one standard deviation above the mean?

33.56%

35.76%

43.57%

43.75%

Flag this QuestionQuestion 81 pts

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

Flag this QuestionQuestion 91 pts

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

0.070

How many pages does a book need to have to fall into the top 25% of pages in this data set?

The book needs to over 494.76 pages to be in the top 25%

The book needs to be over 234.78 pages to be in the top 25%

The book needs to have at least 374.84 pages to be in the top 25%

The book needs to have at least 434.87 pages to be in the top 25%

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