Answered: A parenting magazine reports that the…

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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A parenting magazine reports that the average amount of wireless data used by teenagers each month is 6Gb. For her science fair project, Ella sets out to prove the magazine wrong. She claims that the mean among teenagers in her area is less than reported. Ella collects information from a simple random sample of 4 teenagers at her high school, and calculates a mean of 5.3Gb per month with a standard deviation of 0.6Gb per month. Assume that the population distribution is approximately normal. Test Ella’s claim at the 0.10 level of significance.
Step 1 of 3 : State the null and alternative hypotheses for the test. Fill in the blank below.

H0Ha: μ=6: μ⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯6

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A parenting magazine reports that the average amount of wireless data used by teenagers each month is 6Gb6⁢Gb. For her science fair project, Ella sets out to prove the magazine wrong. She claims that the mean among teenagers in her area is less than reported. Ella collects information from a simple random sample of 44 teenagers at her high school, and calculates a mean of 5.3Gb5.3⁢Gb per month with a standard deviation of 0.6Gb0.6⁢Gb per month. Assume that the population distribution is approximately normal. Test Ella’s claim at the 0.100.10 level of significance.

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