Casio CFX9850GBPLUS User Manual page 315

Z
u 2-Sample
Test
This test is used when the standard deviations for two populations are known to test the
hypothesis. The 2-Sample
o o
Z = Z =
n n
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 specifi cation.
Data .............................. data type
................................. population mean value test conditions ("G
1
................................. population standard deviation of sample 1 (
1
................................. population standard deviation of sample 2 (
2
List(1) ........................... list whose contents you want to use as sample 1 data
List(2) ........................... list whose contents you want to use as sample 2 data
Freq(1).......................... frequency of sample 1 (1 or List 1 to 26)
Freq(2).......................... frequency of sample 2 (1 or List 1 to 26)
Save Res ...................... list for storage of calculation results (None or List 1 to 26)
Execute ........................ executes a calculation or draws a graph
6-5-5
Tests
Z
Test is applied to the normal distribution.
¯ x
– o – o
: mean of sample 1
1
1 1 2 2
¯ x
: mean of sample 2
2
2 2 2 2
1 1 2 2
+ + : population standard deviation of sample 1
1
n n
1 1 2 2
: population standard deviation of sample 2
2
n
: size of sample 1
1
n
: size of sample 2
2
two-tail test, "<
smaller than sample 2, ">
sample 1 is greater than sample 2.)
(List 1 to 26)
(List 1 to 26)
20070201
" specifi es one-tail test where sample 1 is
2
" specifi es one-tail test where
2
" specifi es
2
> 0)
1
> 0)
2