Casio fx-9750G PLUS - Manual (Page 310)

282
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