Asked Jan 18, 2020

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).


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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