281
uu
uu
u1-Prop Z Test
This test is used to test for an unknown proportion of successes. The 1-Prop Z
Test is applied to the normal distribution.
Z =
n
x
n
p
0
(1– p
0
)
– p
0
p0 : expected sample proportion
n : sample size
Perform the following key operations from the statistical data list.
3(TEST)
1(Z)
3(1-P)
Prop ................ sample proportion test conditions (“G p0” specifies two-tail
test, “< p0” specifies lower one-tail test, “> p0” specifies upper
one-tail test.)
p0 .................... expected sample proportion (0 < p0 < 1)
x ..................... sample value (x > 0 integer)
n ..................... sample size (positive integer)
Execute .......... executes a calculation or draws a graph
Example To perform a 1-Prop Z Test for specific expected sample
proportion, data value, and sample size
Perform the calculation using: p0 = 0.5, x = 2048, n = 4040.
1(G)c
a.fw
caeiw
eaeaw
1(CALC)
PropG0.5 ........ direction of test
z ...................... z value
p ...................... p-value
ˆp ...................... estimated sample proportion
n ...................... sample size
Tests 18 - 6
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