Representing Data Answers

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Fill in the missing values in the formula. What is the variance?

3.217

3.522

12.405

148.86

The mean of the data is 18.25.Find the variance.

2.12

3.93

4.5

Standard deviation:

2.08

4.34

9.4

18.8

353.44

Which statement is true of z?

z is between 0 and 1 standard deviations of the mean.

z is between 1 and 2 standard deviations of the mean.

z is between 2 and 3 standard deviations of the mean.

z11.7 ≈

-1.3

0.4

1.3

3.3

Find the standard deviation.

1.98

2.12

2.25

20.25

Is 11.7 within a z-score of 3?

Yes because z < 3.

Yes because z = 3.

No because z > 3.

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