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Chapter 9: The Normal Probability Distribution
Figure 9-24:
Area and probability value for
P
(
z
-1.75)
If one wants to use the standard normal distribution tables for
= -175 one
can use the cumulative normal distribution up to
= -1.75. From the table
the value will again be 0.0401.
Example 9-5:
Find the area under the standard normal distribution curve
between
= 1.5 and
= 2.5.
Solution:
That is, we need to find
P
(1.5
2.5). Using the
Normal
Probability Distribution
workbook to solve, we get
the value of 0.0606.
Thus,
P
(1.5
2.5) = 0.0606. The result is shown in
Figure 9-25
.
Click here for the Normal Probability Distribution Workbook Click here for the z-Table Workbook