If z is a standard normal random variable,what is the area between z = -1.20 and z = 1.40?
1 Answer
Nov 23, 2017
.8041
Explanation:
All we need to do is find the corresponding areas for our z-scores in the table.
Using the table below (this variant of which is from chegg.com), we can see that
the area of the curve to the left of
and the area of the curve to the left of
To find the area between two z-scores, we subtract the smaller one from the larger one:
to come up with our answer.
