Answer both parts Correctly. I will rate accordingly. An article reported that for a sample of 44 kitchens with gas cooking appliances monitored during a one-week period, the sample mean CO, level (ppm) was 654.16, and the sample standard deviation was166.93.(a) Calculate and interpret a 95% (two-sided) confidence interval for true average Co, level in the population of all homes from which the sample was selected. (Round your answers to two decimalplaces.)ppm (b) Suppose the investigators had made arough guess of 175 for the value of s beforecollecting data. What sample size would benecessary to obtain an interval width of 48ppm for a confidence level of 95%? (Roundyour answer up to the nearest wholenumber.)

Given Data : Sample Size, n = 44.0 Sample Mean, x̄ = 654.16 standard…

(b) Suppose the investigators ha rough guess of 175 for the value collecting data. What sample siz necessary ppm for a confidence level of 95 to obtain an interval v your answer up to the nearest w number.)

(b) Suppose the investigators ha rough guess of 175 for the value collecting data. What sample siz necessary ppm for a confidence level of 95 to obtain an interval v your answer up to the nearest w number.)

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Question

Answer both parts Correctly. I will rate accordingly.

An article reported that for a sample of 44 kitchens with gas cooking appliances monitored during a one-week period, the sample mean CO, level (ppm) was 654.16, and the sample standard deviation was
166.93.
(a) Calculate and interpret a 95% (two-sided) confidence interval for true average Co, level in the population of all homes from which the sample was selected. (Round your answers to two decimal
places.)
ppm

(b) Suppose the investigators had made a
rough guess of 175 for the value of s before
collecting data. What sample size would be
necessary to obtain an interval width of 48
ppm for a confidence level of 95%? (Round
your answer up to the nearest whole
number.)

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