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

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

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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