A survey of Canadian teens aged 12 to 17 years reported that roughly75% of them used a fee-based website to download music. You decideto interview a random sample of 20 U.S. teenagers. For now, assumethat they behave similarly to the Canadian teenagers.(a) What is the distribution of the number X of teenagers who useda fee-based website to download music? Explain your answer.(b) What is the probability that at least 15 of these 20 teenagers inyour sample used a fee-based website to download music?(c) Suppose that only 60% of U.S. teenagers used a fee-based websiteto download music. If you interview 20 U.S. teenagers at ran-dom, what is the mean of the number X of teenagers who useda fee-based website to download music? What is the standarddeviation?

It is given that n=20 and p=0.75.

Answered: A survey of Canadian teens aged 12 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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