Operation Manual

Chapter 13: Inferential Statistics and Distributions 228
Note: When a new test or interval is computed, all previous output variables are invalidated.
Inferential Stat Editors for the STAT TESTS Instructions
In this chapter, the description of each STAT TESTS instruction shows the unique inferential stat editor
for that instruction with example arguments.
• Descriptions of instructions that offer the
Data/Stats input choice show both types of input
screens.
• Descriptions of instructions that do not offer the Data/Stats input choice show only one input
screen.
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.
Note: Color spinner menu offers a color graph for Draw.
• Descriptions of instructions that offer only the
Calculate output choice show the calculated results
on the home screen.
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:
L1={299.4, 297.7, 301, 298.9, 300.2, 297}
0: 2-SampTInt...
Confidence interval for difference of 2 m’s, unknown s’s
A: 1-PropZInt...
Confidence interval for 1 proportion
B: 2-PropZInt...
Confidence interval for difference of 2 proportions
C: c
2
-Test... Chi-square test for 2-way tables
D:
c
2
-GOF Test...
Chi-square Goodness of Fit test
E: 2-SampÛTest...
Test comparing 2 s’s
F: LinRegTTest...
t test for regression slope and r
G: LinRegTInt...
Confidence interval for linear regression slope coefficient b
H: ANOVA(
One-way analysis of variance
Data Stats
Input:
EDIT CALC TESTS