A poll of 2,105 randomly selected adults showed that 95% of them own cell phones. The technology display below results from a test of the claim that 93% of adults own cell phones. Use the normal distribution as an approximation to the binomial distribution
A poll of 2,105 randomly selected adults showed that 95% of them own cell phones. The technology display below results from a test of the claim that 93% of adults own cell phones. Use the normal distribution as an approximation to the binomial distribution
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 14PPS
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Question
A poll of 2,105 randomly selected adults showed that 95% of them own cell phones. The technology display below results from a test of the claim that 93% of adults own cell phones. Use the normal distribution as an approximation to the binomial distribution, and assume a 0.05
significance level to complete parts (a) through (e).
significance level to complete parts (a) through (e).
Test of
p=0.93
vs
p≠0.93
|
||||||
Sample
|
X
|
N
|
Sample p
|
95% CI
|
Z-Value
|
P-Value
|
---|---|---|---|---|---|---|
1
|
1998
|
2,105
|
0.949169
|
(0.939785,0.958552)
|
3.45
|
|
b. What is the test statistic?
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