4. Consider the problem of testing Họ: H = 15 against Ha: u> 15 where u is the mean weekly number of hours spent on social media for teenagers in southwester Michigan. A signifiance level of a = 0.05 is planned to be used, and further suppose that we "know that the population standard deviation of this variable is o = 4 hours. (a) What is the smallest sample size neeeded to ensure a power of at least 0.8508 when the true population mean is u = 16? (b) Suppose that a random sample ofn= 50 teenagers is obtained. What is the power of the test to

4. Consider the problem of testing Họ: H = 15 against Ha: u> 15 where u is the mean weekly number of hours spent on social media for teenagers in southwester Michigan. A signifiance level of a = 0.05 is planned to be used, and further suppose that we "know that the population standard deviation of this variable is o = 4 hours. (a) What is the smallest sample size neeeded to ensure a power of at least 0.8508 when the true population mean is u = 16? (b) Suppose that a random sample ofn= 50 teenagers is obtained. What is the power of the test to

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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