180
CHAPTER 7
for US
[02 Ftest2samp]
Two sample data collected from two different populations are tested for population
standard deviation σ
1
and σ
2
.
<Example 2>
To test population standard deviation σ
1
< σ
2
for the two sample data, n
1
= 20, standard
deviation sx
1
= 5.6 and n
2
= 50, standard deviation sx
2
= 6.2, follow the next steps.
• Since we will use the numerical value input method of statistics values for this test,
we will first set the unit to the numerical value input mode.
1. Press
E 1 7
®
to set the unit to the numerical value input mode.
2. Press E 0 2 to display the parameter input screen.
3. Press >
®
≥ to highlight (select) “σ
1
< σ
2
”.
(In the default setting, the cursor pointer will appear at “σ
1
≠ σ
2
”.)
4. 5.6
®
20
®
6.2
®
50
®
5. Press
Ï
to solve.
* F indicates statistics and P indicates probability.
* No input is necessary when there is no weight list.
[03 Ttest1samp]
Tests the hypothesis of population mean µ when the population standard deviation “σ”,
from one sample data of a collected population, is unknown.
EL-9650-(07)En (178-196) 8/1/00, 9:08 AM180
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