Casio CFX-9850G PLUS, User'S Manual & Technical Reference

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The following key operations can be used to draw a graph.
J
cccc
6
(DRAW)
u u
u u 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.
Z
=
n
1
x
1
n
2
x
2
–
p
(1 –
p
)
n
1
1
n
2
1
+
x
1
: sample 1 data value
x
2
: sample 2 data value
n
1
: sample 1 size
n
2
: sample 2 size
ˆp
: estimated sample proportion
Perform the following key operations from the statistical data list.
3
(TEST)
1
(Z)
4
(2-P)
p
1
.................... sample proportion test conditions (“
G
p
2
” specifies two-tail
test, “<
p
2
” specifies one-tail test where sample 1 is smaller
than sample 2, “>
p
2
” specifies one-tail test where sample 1
is greater than sample 2.)
x
1
.................... sample 1 data value (
x
1
>
0 integer)
n
1
.................... sample 1 size (positive integer)
x
2
.................... sample 2 data value (
x
2
>
0 integer)
n
2
.................... sample 2 size (positive integer)
Execute .......... executes a calculation or draws a graph
Example To perform a
p
1
>
p
2
2-Prop
Z
Test for expected sample
proportions, data values, and sample sizes
Perform a
p
1
>
p
2
test using:
x
1
= 225,
n
1
= 300,
x
2
= 230,
n
2
= 300.
18 - 6
Tests