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 deviations is known. It tests the null
hypothesis H0:m=m0 against one of the alternatives below.
•H
a: mƒm0 (m:ƒm0)
•H
a: m<m0 (m:<m0)
•H
a: m>m0 (m:>m0)
In the example: