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7-9-6
Tests
Definition of Terms
Prop condition : sample proportion test condition (“
≠
” specifies two-tail test, “<”
specifies lower one-tail test, “>” specifies upper one-tail test.)
p
0
: expected sample proportion (0 <
p
0
< 1)
x
: sample value (integer,
x
>
0)
n
: sample size (positive integer)
Calculation Result Output
Prop
≠
0.5 : test condition
z
:
z
value
p
:
p
-value
ˆp
: estimated sample proportion
n
: sample size
Example
Data : 13
Sample size : 100
Expected proportion : 20%
• Statistics Wizard Operation
(1) On the menu bar, tap [Calc] and then [Test].
(2) Select [One-Prop ZTest] and then tap [Next >>].
(3) Select Prop condition [
≠
] and input values.
(4) Tap [Next >>].
(5) To display the graph, tap
$
.
u
Program, eActivity or Main Application
Command: OnePropZTest
Command Syntax
“Prop condition”,
p
0
value,
x
value,
n
value
Input Example:
OnePropZTest “
≠
”,0.2,13,100
2-Prop
Z
Test
Menu: [Test]-[Two-Prop ZTest]
Description: This command compares the proportion of successes for two populations.
A 2-Prop
Z
Test is used for 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
ˆ
p
: estimated sample proportion