Texas Instruments TI-84 PLUS - Graphing Calculator Manual Book page 232

2-SampZTest
(two-sample
2-SampZTest
) based on independent samples when both population standard deviations (s
m
2
known. The null hypothesis H
• H : m (m
ƒm 1: ƒm 2
a 1 2
• H : m <m (m
1:< m 2
a 1 2
• H : m >m (m
1:> m 2
a 1 2
In the example:
LISTA={154, 109, 137, 115, 140}
LISTB={108, 115, 126, 92, 146}
Data
Input:
Calculated
results:
Drawn
results:
test; item tests the equality of the means of two populations (m
z 3)
: m =m is tested against one of the alternatives below.
0 1 2
)
)
)
Chapter 13: Inferential Statistics and Distributions
Stats
and
1
and s ) are
1 2
225