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.

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