Casio fx-9860G SD - Manual (Page 318)

20050401
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
: data value of sample 1
x
2
: data value of sample 2
n
1
: size of sample 1
n
2
: size of sample 2
ˆp : 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
” 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
................................. 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.
6-5-8
Tests