HP Prime Graphing Wireless Calculator - Manual (Page 82)

78 Inference app
Inputs The inputs are:
Results The results are:
Two-Sample Z-Test
Menu name Z-Test: μ
1
– μ
2
On the basis of two samples, each from a separate
population, this test measures the strength of the evidence
for a selected hypothesis against the null hypothesis. The
null hypothesis is that the means of the two populations
are equal, Η
0
: μ
1
= μ
2
.
You select one of the following alternative hypotheses to
test against the null hypothesis:
H
0
: μ
1
< μ
2
H
0
: μ
1
> μ
2
H
0
: μ
1
≠ μ
2
Field name Definition
Sample mean
n Sample size
μ
0
Hypothetical population mean
σ Population standard deviation
α Significance level
x
Result Description
Test Z Z-test statistic
Test Value of associated with the
test Z-value
P Probability associated with the
Z-Test statistic
Critical Z Boundary value(s) of Z
associated with the α level that
you supplied
Critical Boundary value(s) of required
by the α value that you supplied
x x
x x