Two-Sample T-Test - HP 40gs User Manual

hp40g+.book Page 14 Friday, December 9, 2005 1:03 AM

Two-Sample T-Test

Menu name
Inputs
11-14
T-Test: μ1 – μ2
The Two-sample T-Test is used when the population
standard deviation is not known. On the basis of statistics
from two samples, each sample from a different
population, this test measures the strength of the evidence
for a selected hypothesis against the null hypothesis. The
null hypothesis is that the two populations means are
: μ = μ
equal H .
1 2
0
You select one of the following alternative hypotheses
against which to test the null hypothesis
H
H
H
The inputs are:
Field Definition
name
Sample 1 mean.
x1
Sample 2 mean.
x2
S1 Sample 1 standard deviation.
S2 Sample 2 standard deviation.
n1 Sample 1 size.
n2 Sample 2 size.
α
Significance level.
_Pooled?
Check this option to pool samples
based on their standard deviations.
μ
:μ <
1 1 2
μ
:μ >
1 1 2
≠ μ
:μ
1 1 2
Inference aplet