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tion 2) Exposure tung study meas workplace exposure to tunnel construction workers. Part of the study compared 120 drill a workers with 215 outdoor concrete workers. Total dust exposure was measured in milligram ubic meter (mg.y). The mean exposure for the drill and blast workers was 16.0 mg.y with a leviation of 7.5 mg. For the outdoor concrete workers, the corresponding values were 5.8 mg.y m³ m a) The sample included all workers for a tunnel construction company who received medi xaminations as part of routine health checkups. Discuss the extent to which you think the pply to other similar types of workers.

tion 2) Exposure tung study meas workplace exposure to tunnel construction workers. Part of the study compared 120 drill a workers with 215 outdoor concrete workers. Total dust exposure was measured in milligram ubic meter (mg.y). The mean exposure for the drill and blast workers was 16.0 mg.y with a leviation of 7.5 mg. For the outdoor concrete workers, the corresponding values were 5.8 mg.y m³ m a) The sample included all workers for a tunnel construction company who received medi xaminations as part of routine health checkups. Discuss the extent to which you think the pply to other similar types of workers.

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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Question 2) Exposure to dust at work can lead to lung disease later in life. One study measured the workplace exposure to tunnel construction workers. Part of the study compared 120 drill and blast workers with 215 outdoor concrete workers. Total dust exposure was measured in milligram years per cubic meter (mg). The mean exposure for the drill and blast workers was 16.0 mg.y with a standard deviation of 7.5 mg.y. For the outdoor concrete workers, the corresponding values were 5.8 mg and 3.6 mg.y m² m² (a) The sample included all workers for a tunnel construction company who received medical examinations as part of routine health checkups. Discuss the extent to which you think these results apply to other similar types of workers. (b) Use a 95% confidence interval to describe the difference in the exposures, Write a sentence that gives the interval and provides the meaning of the 95% confidence. (c) Test the null hypothesis that the exposures for these two types of workers are the same. Justify your choice of a one-sided or two-sided alternative. Report the test statistic, the degrees of freedom, and the P-value. Give a short summary of your conclusion.
Transcribed Image Text:Question 2) Exposure to dust at work can lead to lung disease later in life. One study measured the workplace exposure to tunnel construction workers. Part of the study compared 120 drill and blast workers with 215 outdoor concrete workers. Total dust exposure was measured in milligram years per cubic meter (mg). The mean exposure for the drill and blast workers was 16.0 mg.y with a standard deviation of 7.5 mg.y. For the outdoor concrete workers, the corresponding values were 5.8 mg and 3.6 mg.y m² m² (a) The sample included all workers for a tunnel construction company who received medical examinations as part of routine health checkups. Discuss the extent to which you think these results apply to other similar types of workers. (b) Use a 95% confidence interval to describe the difference in the exposures, Write a sentence that gives the interval and provides the meaning of the 95% confidence. (c) Test the null hypothesis that the exposures for these two types of workers are the same. Justify your choice of a one-sided or two-sided alternative. Report the test statistic, the degrees of freedom, and the P-value. Give a short summary of your conclusion.
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