From previous studies, it is concluded that 60% of phone numbers in a certain city are unlisted. A researcher claims that the proportion is smaller than 60% and decides to survey 600 working adults. Test the researcher's claim at the α=0.025 significance level.Based on the sample of 600 people, 54% phone numbers in a certain city are unlisted. What is the test statistic? Round your answer to two decimal places. What is the pp-value? Round your answer to four decimal places. Make a decision.Reject the null hypothesis.Do not reject the null hypothesis.Make a conclusion.There is not sufficient evidence that the proportion of people who phone numbers in a certain city are unlisted is smaller than 60% at the α=0.025 significance level.There is sufficient evidence that the proportion of people who phone numbers in a certain city are unlisted is smaller than 60% at the α=0.025 significance level.

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Description: From previous studies, it is concluded that 60% of phone numbers in a certain city are unlisted. A researcher claims that the proportion is smaller than 60% and decides to survey 600 working adults. Test the researcher's claim at the α=0.025 signific

H0 : p =0.6 H1 : p <0.6 Sample size = n =600 Sample proportion = p̂ = 0.54

Answered: From previous studies, it is concluded…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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From previous studies, it is concluded that 60% of phone numbers in a certain city are unlisted. A researcher claims that the proportion is smaller than 60% and decides to survey 600 working adults. Test the researcher's claim at the α=0.025 significance level.

Based on the sample of 600 people, 54% phone numbers in a certain city are unlisted. What is the test statistic? Round your answer to two decimal places.
What is the pp-value? Round your answer to four decimal places.
Make a decision.
- Reject the null hypothesis.
- Do not reject the null hypothesis.
Make a conclusion.
- There is not sufficient evidence that the proportion of people who phone numbers in a certain city are unlisted is smaller than 60% at the α=0.025 significance level.
- There is sufficient evidence that the proportion of people who phone numbers in a certain city are unlisted is smaller than 60% at the α=0.025 significance level.

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