Casio CFX9850GBPLUS - Page 318

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.
x 1 : data value of sample 1
x 2 : data value of sample 2
n 1 : size of sample 1
n 2 : 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)
p 1 ................................. sample proportion test conditions (“G p 2 ” specifi es two-tail
test, “< p 2 ” specifi es one-tail test where sample 1 is smaller
than sample 2, “> p 2 ” specifi es one-tail test where sample 1
is greater than sample 2.)
x 1 ................................. data value ( x 1 > 0 integer) of sample 1
n 1 ................................. size (positive integer) of sample 1
x 2 ................................. data value ( x 2 > 0 integer) of sample 2
n 2 ................................. 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.
Z
=
n
1
x
1
n
2
x
2
–
p(1 – p )
n
1
1
n
2
1
+
Z
=
n
1
x
1
n
2
x
2
–
p(1 – p )
n
1
1
n
2
1
+
6-5-8
Te s ts