An article reported that for a sample of 51 kitchens with gas cooking appliances monitored during a one-week period, the sample mean CO₂ level (ppm) was 654.16, and the samplestandard deviation was 166.08.(a) Calculate and interpret a 95% (two-sided) confidence interval for true average CO₂ level in the population of all homes from which the sample was selected. (Round your answersto two decimal places.)ppmInterpret the resulting interval.O We are 95% confident that the true population mean lies below this interval.O We are 95% confident that this interval contains the true population mean.O We are 95% confident that the true population mean lies above this interval.O We are 95% confident that this interval does not contain the true population mean.(b) Suppose the investigators had made a rough guess of 185 for the value of s before collecting data. What sample size would be necessary to obtain an interval width of 41 ppm fora confidence level of 95%? (Round your answer up to the nearest whole number.)kitchensYou may need to use the appropriate table in the Appendix of Tables to answer this question.

Given: n=51μ=654.16s=166.08α=0.05

Answered: An article reported that for a sample…

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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