In 2016, 77% of American households owned at least one cell phone. A researcher believes this proportion has increased. A random sample of 125 households is obtained, and it is determined that 108 of them own at least one cell phone. At the level of significance, test the researcher’s hypothesis. You may use StatCrunch Set up the null and alternative hypotheses: Is the test Left-tail Right-tail Two-tailedFind , the sample proportion (use 3 decimal places): You can assume that the sample size is not too big. Check the requirement that the sample size is big enough: Calculate the test statistic using the formula or obtain it from StatCrunch (2 decimals):

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Description: In 2016, 77% of American households owned at least one cell phone. A researcher believes this proportion has increased. A random sample of 125 households is obtained, and it is determined that 108 of them own at least one cell phone. At the level of

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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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In 2016, 77% of American households owned at least one cell phone. A researcher believes this proportion has increased. A random sample of 125 households is obtained, and it is determined that 108 of them own at least one cell phone. At the level of significance, test the researcher’s hypothesis. You may use StatCrunch

Set up the null and alternative hypotheses:

Is the test Left-tail Right-tail Two-tailed
Find , the sample proportion (use 3 decimal places):

You can assume that the sample size is not too big. Check the requirement that the sample size is big enough:

Calculate the test statistic using the formula or obtain it from StatCrunch (2 decimals):

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