user manual

13-10 Inferential Statistics and Distributions
8313INFE.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 12:47 PM Printed: 02/19/01 1:38 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
:
ƒm
0
)
•
H
a
:
m
<
m
0
(
m
:<
m
0
)
•
H
a
:
m
>
m
0
(
m
:>
m
0
)
In the example:
L
1
={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.
Z
.
Test