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Asked Jan 18, 2020
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Basis for the Range Rule of Thumb and the Empirical Rule. In Exercise, find the indicated area under the curve of the standard normal distribution, then convert it to a percentage andfill in the blank. The results form the basis for the range rule of thumb and the empirical rule introduced in Section 3-3.

About_____% of the area is between z = − 2 and z=2 (or within 2 standard deviation of the mean).

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Expert Answer

Step 1

Solution: We have to find the area under the standard normal curve  within the two standard deviations of the mean. 

 

Step 2

The empirical rule of normal distribution states that:

68% of the area of the standard normal distribution lies within one standard deviation of the mean.

95% of the area of the standard normal dis...

Statistics homework question answer, step 2, image 1
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