Casio fx-9860G AU User Manual page 315

u u u u u 2-Sample Z
Test
This test is used when the standard deviations for two populations are known to test the
hypothesis. The 2-Sample
o
Z =
σ
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 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
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.
– o o
: mean of sample 1
1
1 2
o
: mean of sample 2
σ 2
2 2
σ
1 2
+
: population standard deviation of sample 1
1
n
σ
1 2
: population standard deviation of sample 2
2
n
: size of sample 1
1
n
: size of sample 2
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.)
(List 1 to 26)
(List 1 to 26)
20050401
" specifies two-
2
" specifies one-tail test where
2
> 0)
1
> 0)
2