13–10 Inferential Statistics and Distributions
8250FC~1.DOC TI-83 international English Bob Fedorisko Revised: 10/26/05 1:39 PM Printed: 10/27/05 2:57
PM Page 10 of 36
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}
Data Stats
Input:
,,
Calculated results:
,,
Drawn results:
Note: All examples on pages13.10 through 13.25 assume a fixed-
decimal mode setting of 4 (Chapter 1). If you set the decimal mode to
Float or a different fixed-decimal setting, your output may differ from
the output in the examples.
STAT TESTS Menu (continued)
Z.Test
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