Texas Instruments TI-83 PLUS - Manual (Page 402)

TI-83 Plus Inferential Statistics and Distributions 399
2 . SampZTest
2 . SampZTest (two-sample z test; item 3 ) tests the equality of the means of
two populations ( m
1
and m
2
) based on independent samples when both
population standard deviations ( s
1
and s
2
) are known. The null
hypothesis H
0
: m
1
= m
2
is tested against one of the alternatives below.
•
H
a
: m
1
ƒm
2
( m 1: ƒm 2 )
•
H
a
: m
1
< m
2
( m 1:< m 2 )
•
H
a
: m
1
> m
2
( m 1:> m 2 )
In the example:
LISTA={154 109 137 115 140}
LISTB={108 115 126 92 146}
Data Stats
Input:
, ,