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Suppose a 1980 study was conducted whose purpose was to compare the indoor air quality in offices where smoking was permitted with that in offices where smoking was not permitted. Measurements were made of carbon monoxide (CO) at 1:20 p.m. in 40 work areas where smoking was permitted and in 40 work areas where smoking was not permitted. Where smoking was permitted, the mean CO level was 11.7 parts per million (ppm) and the standard deviation CO was 7.4 ppm. Where smoking was not permitted, the mean CO was 6.6 ppm and the standard deviation CO was 2.8 ppm. (Let population 1 be smoking was permitted and population 2 be smoking was not permitted.) (a) Test for whether the variance of CO is significantly different in the two types of working environments. (Use α = 0.05.) State the null and alternative hypotheses (in ppm). (Enter != for as needed.) Ho: H₂: Find the test statistic. (Round your answer to two decimal places.) Find the p-value. (Round your answer to four decimal places.) p-value = State your conclusion. O Fail to reject Ho. There is insufficient evidence to conclude that the variance of CO is significantly different in the two types of working environment- O Reject Ho. There is sufficient evidence to conclude that the variance of CO is significantly different in the two types of working environments. O Fail to reject Ho. There is sufficient evidence to conclude that the variance of CO is significantly different in the two types of working environments O Reject Ho. There is insufficient evidence to conclude that the variance of CO is significantly different in the two types of working environments.

Suppose a 1980 study was conducted whose purpose was to compare the indoor air quality in offices where smoking was permitted with that in offices where smoking was not permitted. Measurements were made of carbon monoxide (CO) at 1:20 p.m. in 40 work areas where smoking was permitted and in 40 work areas where smoking was not permitted. Where smoking was permitted, the mean CO level was 11.7 parts per million (ppm) and the standard deviation CO was 7.4 ppm. Where smoking was not permitted, the mean CO was 6.6 ppm and the standard deviation CO was 2.8 ppm. (Let population 1 be smoking was permitted and population 2 be smoking was not permitted.) (a) Test for whether the variance of CO is significantly different in the two types of working environments. (Use α = 0.05.) State the null and alternative hypotheses (in ppm). (Enter != for as needed.) Ho: H₂: Find the test statistic. (Round your answer to two decimal places.) Find the p-value. (Round your answer to four decimal places.) p-value = State your conclusion. O Fail to reject Ho. There is insufficient evidence to conclude that the variance of CO is significantly different in the two types of working environment- O Reject Ho. There is sufficient evidence to conclude that the variance of CO is significantly different in the two types of working environments. O Fail to reject Ho. There is sufficient evidence to conclude that the variance of CO is significantly different in the two types of working environments O Reject Ho. There is insufficient evidence to conclude that the variance of CO is significantly different in the two types of working environments.

MATLAB: An Introduction with Applications
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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Suppose a 1980 study was conducted whose purpose was to compare the indoor air quality in offices where smoking was permitted with that in offices where smoking was not permitted. Measurements were made of carbon monoxide (CO) at 1:20 p.m. in 40 work areas where smoking was permitted and in 40 work areas where smoking was not permitted. Where smoking was permitted, the mean CO level was 11.7 parts per million (ppm) and the standard deviation CO was 7.4 ppm. Where smoking was not permitted, the mean CO was 6.6 ppm and the standard deviation CO was 2.8 ppm. (Let population 1 be smoking was permitted and population 2 be smoking was not permitted.) (a) Test for whether the variance of CO is significantly different in the two types of working environments. (Use α = 0.05.) State the null and alternative hypotheses (in ppm). (Enter != for as needed.) Ho: H₂: Find the test statistic. (Round your answer to two decimal places.) Find the p-value. (Round your answer to four decimal places.) p-value = State your conclusion. O Fail to reject Ho. There is insufficient evidence to conclude that the variance of CO is significantly different in the two types of working environments. O Reject Ho. There is sufficient evidence to conclude that the variance of CO is significantly different in the two types of working environments. O Fail to reject Ho. There is sufficient evidence to conclude that the variance of CO is significantly different in the two types of working environments. O Reject Ho. There is insufficient evidence to conclude that the variance of CO is significantly different in the two types of working environments.
Transcribed Image Text:Suppose a 1980 study was conducted whose purpose was to compare the indoor air quality in offices where smoking was permitted with that in offices where smoking was not permitted. Measurements were made of carbon monoxide (CO) at 1:20 p.m. in 40 work areas where smoking was permitted and in 40 work areas where smoking was not permitted. Where smoking was permitted, the mean CO level was 11.7 parts per million (ppm) and the standard deviation CO was 7.4 ppm. Where smoking was not permitted, the mean CO was 6.6 ppm and the standard deviation CO was 2.8 ppm. (Let population 1 be smoking was permitted and population 2 be smoking was not permitted.) (a) Test for whether the variance of CO is significantly different in the two types of working environments. (Use α = 0.05.) State the null and alternative hypotheses (in ppm). (Enter != for as needed.) Ho: H₂: Find the test statistic. (Round your answer to two decimal places.) Find the p-value. (Round your answer to four decimal places.) p-value = State your conclusion. O Fail to reject Ho. There is insufficient evidence to conclude that the variance of CO is significantly different in the two types of working environments. O Reject Ho. There is sufficient evidence to conclude that the variance of CO is significantly different in the two types of working environments. O Fail to reject Ho. There is sufficient evidence to conclude that the variance of CO is significantly different in the two types of working environments. O Reject Ho. There is insufficient evidence to conclude that the variance of CO is significantly different in the two types of working environments.
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