172
Chapter 10: Statistics & Regression Calculations
• µ
0
indicates the hypothesis mean, σ indicates the population
standard deviation, x indicates the sample mean and n
indicates the sample size. (“n” is a positive integer.)
4. Enter the appropriate value in each field.
5. Press @ h.
Answers will be displayed on
the screen, where z indi-
cates the test statistic and p
indicates the p value of the
test.
09 Ztest2samp Tests the equality of two sample means, µ
1
and µ
2
.
Example
Test µ
1
> µ
2
where x
_
1
= 77.3, σ
1
= 3.4, n
1
= 30, and x
_
2
= 75.2, σ
2
=
2.8, n
2
= 20.
Set the input method to value input mode
1. Press # S E 1 7 E.
2. Press S E 0 9.
The parameter input screen will appear.
3. Enter the appropriate value
into each field.
4. Press @ h.
Answers will be displayed on
the screen.
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