Consider the population consisting of all computers of a certain brand and model, and focus on whether a computer needs service while under warranty. (a) Pose several probability questions based on selecting a sample of 900 such computers. (Select all that apply.) O How likely is it that more than half of the sampled computers will need or have needed warranty service? What is the number of computers that will need warranty service in the population? How many more than half the population of computers will need warranty service? How likely is it that the number needing warranty service will exceed the expected number by more than 10? what is the expected number among the 900 that need warranty service? (b) What inferential statistics question might be answered by determining the number of such computers in a sample of size 900 that need warranty service? (Select all that apply.) Does the sample provide compelling evidence for concluding that more than 10% of all such computers need warranty service? Does the population provide compelling evidence for concluding that more than 10% of the sample computers need warranty service? Suppose that 135 of the 900 sampled needed warranty service. How confident can we be that the proportion of sampled computers needing warranty service is between 8 and 22? Suppose that 135 of the 900 sampled needed warranty service. How confident can we be that the proportion of all such computers needing warranty service is between 0.08 and 0.22? Can we conclude that the population will have the same percentage of warranty service as the sample needed?

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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Transcribed Image Text:Consider the population consisting of all computers of a certain brand and model, and focus on whether a computer needs service while under warranty. (a) Pose several probability questions based on selecting a sample of 900 such computers. (Select all that apply.) How likely is it that more than half of the sampled computers will need or have needed warranty service? What is the number of computers that will need warranty service in the population? O How many more than half the population of computers will need warranty service? How likely is it that the number needing warranty service will exceed the expected number by more than 10? What is the expected number among the 900 that need warranty service? (b) What inferential statistics question might be answered by determining the number of such computers in a sample of size 900 that need warranty service? (Select all that apply.) Does the sample provide compelling evidence for concluding that more than 10 % of all such computers need warranty service? O Does the population provide compelling evidence for concluding that more than 10% of the sample computers need warranty service? Suppose that 135 of the 900 sampled needed warranty service. How confident can we be that the proportion of sampled computers needing warranty service is between 8 and 22? Suppose that 135 of the 900 sampled needed warranty service. How confident can we be that the proportion of all such computers needing warranty service is between 0.08 and 0.22? O Can we conclude that the population will have the same percentage of warranty service as the sample needed?

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