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Chapter 8: Statistics & Regression Calculations
3. Press ' E } to
4. Move the cursor pointer to
5. Set the List to L1 and press E.
6. Press @ h .
04 Ttest2samp
Tests two sample means, µ
Example
Test the following two samples;
List 1 {2.37, 2.51, 2.43, 2.28, 2.46, 2.55, 2.49}
List 2 {2.63, 2.71, 2.56, 2.61, 2.55, 2.68, 2.42, 2.48, 2.51, 2.65}
1. Enter the above data into lists L1 and L2, respectively.
2. Press S E 0 4.
3. Enter the appropriate value
170
and press E.
select µ < µ
0
µ
and input 65 and press
0
E.
Answers are displayed on
the screen, where t is the t
statistic for the test, p is the
p value for the test and sx
indicates sample standard
deviation.
• If there is no weight list, the Freq field can remain empty.
The parameter input screen
will appear.
into each field.
If no Freq specification data
is input, an initial Freq value
of 1 is used.
* Pooled is prediction for
unknown s
, s
.
1
2
Select "No" if s
, s
, are
1
2
subjectively unequal.
Select "Yes" if s
, s
, are equal.
1
2
Calculation is executed using this prediction as the basis.
and µ
.
1
2
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