Casio fx-9750G PLUS

279
Perform the following key operations from the statistical result screen.
J(To data input screen)
cccccc(To Execute line)
6(DRAW)
uu
uu
u2-Sample Z Test
This test is used when the sample standard deviations for two populations are
known to test the hypothesis. The 2-Sample Z Test is applied to the normal
distribution.
Z =
o
1
– o
2
σ
n
1
1
2
σ
n
2
2
2
+
o1 : sample 1 mean
o2 : sample 2 mean
σ 1 : population standard deviation of sample 1
σ 2 : population standard deviation of sample 2
n1 : sample 1 size
n2 : sample 2 size
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 1 .................... population mean value test conditions (“G µ 2” specifies two-
tail test, “< µ 2” specifies one-tail test where sample 1 is
smaller than sample 2, “> µ 2” specifies one-tail test where
sample 1 is greater than sample 2.)
σ 1 .................... population standard deviation of sample 1 ( σ 1 > 0)
σ 2 .................... population standard deviation of sample 2 ( σ 2 > 0)
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
Tests 18 - 6