Texas Instruments TI-83 Manual Book page 250

2.SampZTest
Input:
Calculated results:
Drawn results:
13-12 Inferential Statistics and Distributions
(two-sample z test; item
2.SampZTest
of the means of two populations (m
independent samples when both population standard
and s
deviations (s
1
: m
H =m is tested against one of the alternatives below.
0 1 2
: m ƒm
H ( m1:ƒm2
a 1 2
: m
H <m (
m1:<m2
a 1 2
: m
H >m (
m1:>m2
a 1 2
In the example:
LISTA={154 109 137 115 140}
LISTB={108 115 126 92 146}
Data
,
,
1
) are known. The null hypothesis
2
)
)
)
) tests the equality
3
and m
) based on
2
Stats
,
,