Standard Deviation Answers

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Which equation can you use to calculate the missing credit score?

Option

The missing credit score was .

752

808

810

z11.7 ≈

-1.3

0.4

1.3

3.3

Is 11.7 within a z-score of 3?

Yes because z < 3.

Yes because z = 3.

No because z > 3.

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.

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

Find the standard deviation.

1.98

2.12

2.25

20.25

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