Casio FX-9750G PLUS User's Manual & Technical Reference page 307

Perform the following key operations from the statistical result screen.
J(To data input screen)
cccccc(To Execute line)
6(DRAW)
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. The 2-Sample
distribution.
– o
o
1 2
Z =
σ σ
2 2
+
1 2
n n
1 2
Perform the following key operations from the statistical data list.
3(TEST)
1(Z)
2(2-S)
The following shows the meaning of each item in the case of list data specification.
Data ................ data type
µ .................... population mean value test conditions ("G µ
1
σ .................... population standard deviation of sample 1 ( σ
1
σ .................... population standard deviation of sample 2 ( σ
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
Freq2 .............. frequency of sample 2
Execute .......... executes a calculation or draws a graph
: sample 1 mean
o
1
: sample 2 mean
o
2
σ
: population standard deviation of sample 1
1
σ
: population standard deviation of sample 2
2
n
: sample 1 size
1
n
: sample 2 size
2
tail test, "< µ
" specifies one-tail test where sample 1 is
2
smaller than sample 2, "> µ
sample 1 is greater than sample 2.)
Tests
Z
Test is applied to the normal
2
" specifies one-tail test where
2
18 - 6
" specifies two-
> 0)
1
> 0)
2
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