Chapter 13: Inferential Statistics and Distributions 342
The description then shows the unique output screen for that instruction with the
example results.
• Descriptions of instructions that offer the
Calculate/Draw output choice show both
types of screens: calculated and graphic results.
• Descriptions of instructions that offer only the
Calculate output choice show the
calculated results on the home screen.
Z-Test
Z-TestZ-Test
Z-Test
Z-Test (one-sample z test; item 1) performs a hypothesis test for a single unknown
population mean m when the population standard deviation s is known. It tests the null
hypothesis H
0
: m=m
0
against one of the alternatives below.
•H
a
: mƒm
0
(m:ƒm0)
•H
a
: m<m
0
(m:<m0)
•H
a
: m>m
0
(m:>m0)
In the example:
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