Answered: How do i calculate finding the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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How do i calculate finding the percentage between two z scores?

Expert Solution

Step 1

To find the probability between two z-scores:

z-score represents the number of standard deviations away a data value is from the mean.

Suppose say there are two z-scores 0.25 and 2.74. First we need to find the area corresponding to each z-score using a standard normal table.

Look up for 0.25 in the table i.e., 0.2 in the row and 0.05 along the column and the intersection of these two values gives the probability of 0.5987

Similarly, look up z-score 2.74 in the table i.e., 2.7 in the row and 0.04 in the column, the intersection of these values gives us the probability or area to the left of the score which is 0.9969

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