# Another Special Cases of Z-scores

Briefly explain what percentages of the cases in the normal curve you can obtain by using a z-score of 2.58 as a cutoff point.

Specifically:

A. Discuss the percentages in the middle area (near the mean).

B. Discuss the percentages in the tails.

https://brainmass.com/statistics/z-test/another-special-cases-z-scores-157651

#### Solution Preview

Another Special Cases of z-scores

Briefly explain what percentages of the cases in the normal curve you can obtain by using a z-score of 2.58 as a cutoff point. Specifically:

A. Discuss the percentages in the middle area (near the mean).

To start, I looked up z = 2.58 in a z-distribution table.

0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 ...

#### Solution Summary

The expert briefly explains what percentages of the cases in the normal curve. The percentages in the middle area are given.

$2.19