17+Normal+distributions+when+given+a+z-score+(or+when+you+can+calculate+the+z-score)

Normal distributions when given a z-score (or when you can calculate the z-score)

Whn given a z- score, the first step is to look at a z score chart to find the corresponding percent. This percentage is the percentage of all of the data that occurs before the z- score line. For example:

If the z- score given is 1.92 --> we would find the z- score on the chart and write down the corresponding number. The percentage for 1.92 is .9726 This means that 97.26% of the data comes before the z- score line.

It is importanrt to remember that z- scores are always a point of a normal bell curve. As an example:



Here are examples of the questions given with this lesson.

Example 1-

 Z- Score Chart



Chart- http://www.regentsprep.org/Regents/math/algtrig/ATS7/ZChart.htm Picture of bell curve- http://www.ltcconline.net/greenl/courses/201/probdist/zScore.htm