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Z
2-Sample
Te t
Menu:
[Test]-[Two-Sample ZTest]
De cription: Tests a hypothesis relative to the population mean of two populations when
the standard deviations of the two populations are known. A 2-Sample
is used for normal distributions.
Z =
Definition of Term
μ
condition : population mean value test conditions (" " specifies two-tail test,
1
σ
:
1
σ
:
2
List(1) :
List(2) :
Freq(1) :
Freq(2) :
:
1
n
:
1
:
2
n
:
2
Calculation Re ult Output
μ
μ
: test condition
1
2
z
z
:
value
p
p
:
-value
:
sample mean of sample 1 data
1
:
sample mean of sample 2 data
2
s
:
sample standard deviation of sample 1 (Displayed only for list format.)
x
1
s
:
sample standard deviation of sample 2 (Displayed only for list format.)
x
2
n
:
size of sample 1
1
n
:
size of sample 2
2
7-9-4
Tests
—
: sample mean of sample 1 data
1
1
2
: sample mean of sample 2 data
2
2
2
1
+
2
σ
: population standard deviation of sample 1
1
n
n
1
2
σ
: population standard deviation of sample 2
2
n
: size of sample 1
1
n
: size of sample 2
2
"<" specifies one-tail test where sample 1 is less than sample 2, ">"
specifies one-tail test where sample 1 is greater than sample 2).
population standard deviation of sample 1 ( σ
population standard deviation of sample 2 ( σ
list where sample 1 data is located
list where sample 2 data is located
frequency of sample 1 (1 or list name)
frequency of sample 2 (1 or list name)
sample mean of sample 1 data
size of sample 1 (positive integer)
sample mean of sample 2 data
size of sample 2 (positive integer)
20090601
Z
Test
> 0)
1
> 0)
2
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