20070201
u 2-Prop Z Test
This test is used to compare the proportion of successes. The 2-Prop Z Test is applied to
the normal distribution.
x1 : data value of sample 1
x2 : data value of sample 2
n1 : size of sample 1
n2 : size of sample 2
ˆ p : estimated sample proportion
Perform the following key operation from the statistical data list.
3(TEST)
1(Z)
4(2-P)
p1 ................................. sample proportion test conditions (“G p2” specifi es two-tail
test, “< p2” specifi es one-tail test where sample 1 is smaller
than sample 2, “> p2” specifi es one-tail test where sample 1
is greater than sample 2.)
x1 ................................. data value ( x1 > 0 integer) of sample 1
n1 ................................. size (positive integer) of sample 1
x2 ................................. data value ( x2 > 0 integer) of sample 2
n2 ................................. size (positive integer) of sample 2
Save Res ...................... list for storage of calculation results (None or List 1 to 26)
Execute ........................ executes a calculation or draws a graph
After setting all the parameters, use c to move the highlighting to “Execute” and then press
one of the function keys shown below to perform the calculation or draw the graph.
• 1(CALC) ... Performs the calculation.
• 6(DRAW) ... Draws the graph.
=
n
1
x
1
n
2
x
2
–
p(1 – p )
n
1
1
n
2
1
+
=
n
1
x
1
n
2
x
2
–
p(1 – p )
n
1
1
n
2
1
+
6-5-8
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