Casio CFX-9970G User Manual page 298

18 - 6
Tests
Perform the following key operation from the statistical result screen.
u u u u u 2-Sample Z Test
This test is used when the sample standard deviations for two populations are
known to test the hypothesis that the population means of the two populations are
equal. The 2-Sample
Perform the following key operation from the statistical data list.
The following shows the meaning of each item in the case of list data specification.
J(To data input screen)
cccccc(To Execute line)
6(DRAW)
Z
Test is applied to standard normal distribution.
o – o
1 2
Z =
2 2
% %
1 + 2
n n
1 2
3(TEST)
1(Z)
2(2-S)
Data ................ data type
.................... population mean value test conditions ("G µ
µ
1
tail test, "< µ
smaller than sample 2, "> µ
sample 1 is greater than sample 2.)
.................... population standard deviation of sample 1 ( %
%
1
.................... population standard deviation of sample 2 ( %
%
2
List1 ................ list whose contents you want to use as sample 1 data
List2 ................ list whose contents you want to use as sample 2 data
Freq1 .............. frequency of sample 1 (positive integer)
Freq2 .............. frequency of sample 2 (positive integer)
Execute .......... executes a calculation or draws a graph
o
: sample 1 mean
1
o
: sample 2 mean
2
: population standard deviation of sample 1
%
1
: population standard deviation of sample 2
%
2
n
: sample 1 size
1
n
: sample 2 size
2
" specifies one-tail test where sample 1 is
2
" specifies one-tail test where
2
" specifies two-
2
> 0)
1
> 0)
2
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