Casio FX-9860G u2-Sample Z Test

6-5-5 Tests

u2-Sample Z Test

This test is used when the standard deviations for two populations are known to test the hypothesis. The 2-SampleZ Test is applied to the normal distribution.

Z = o1		– o2		x¯1	: mean of sample 1
				x¯2	: mean of sample 2
	σ 2		σ 2
	1		2	σ1	: population standard deviation of sample 1
	n1	+ n2
				σ2	: population standard deviation of sample 2
				n1	: size of sample 1
				n2	: size of sample 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
μ1 .................................	population mean value test conditions (“G μ2” specifies
	two-tail test, “< μ2” specifies one-tail test where sample 1 is
	smaller than sample 2, “> μ2” specifies one-tail test where
	sample 1 is greater than sample 2.)
σ1 .................................	population standard deviation of sample 1 (σ1 > 0)
σ2 .................................	population standard deviation of sample 2 (σ2 > 0)
List(1) ...........................	list whose contents you want to use as sample 1 data
	(List 1 to 26)
List(2) ...........................	list whose contents you want to use as sample 2 data
	(List 1 to 26)
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

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