A poll of 2,018 randomly selected adults showed that 94% of them own cell phones. The technology display below results from a test of the claim that 95% 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). Is the test two-tailed, left-taile
A poll of 2,018 randomly selected adults showed that 94% of them own cell phones. The technology display below results from a test of the claim that 95% 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). Is the test two-tailed, left-taile
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 3BGP
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A poll of 2,018 randomly selected adults showed that 94% of them own cell phones. The technology display below results from a test of the claim that 95% of adults own cell phones. Use the
- Is the test two-tailed, left-tailed, or right-tailed?
Left-tailed test
Right tailed test
Two-tailed test
- What is the test statistic?
The test statistic is
(Round to two decimal places as needed.)
- What is the P-value?
(Round to three decimal places as needed.)
- What is the null hypothesis and what do you conclude about it?
Identify the null hypothesis
- Ho: p> 0.95
- Ho: p= 0.95
- Ho: p< 0.95
- Ho: p≠ 0.95
Choose the correct answer below.
- Fail the null hypothesis because the P-value is greater than the significance level, α
- Reject the null hypothesis because the P-value is less than or equal to the significance level, α
- Reject the null hypothesis because the P-value is greater than the significance level, α
- Fail to reject the null hypothesis because the P-value is less than or equal to the significance
- What is the final conclusion?
- There is not sufficient evidence to support the claim that 95% of adults own a cell phone.
- There is sufficient evidence to warrant rejection of the claim that 95% of adults own a cell phone.
- There is not sufficient evidence to warrant rejection of the claim that 95% of adults own a cell phone.
- There is sufficient evidence to support the claim that 95% of adults own a cell phone.
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