Construct a confidence interval for the proportion

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Question - Stress by occupation. As part of a study on the impact of job stress on smoking, researchers used data from the Health and Retirement Study (HRS) to collect information on 3825 "ever-smoker" individuals who were 50 to 64 years of age.16 An ever-smoker is someone who was a smoker at some time in his or her life. The HRS survey provided the researchers with 17,043 "person-year" observations. One of the questions on the survey asked a participant how much he or she agrees or disagrees with the statement "My job involves a lot of stress." The answers were coded as a 1 if a participant "strongly agreed" and 0 otherwise. The following table summarizes these responses by occupation.

Occupation

p^

n

Professional

0.23

2447

Managerial

0.22

2552

Administrative

0.17

2309

Sales

0.15

1811

Service

0.13

2592

Mechanical

0.12

1979

Operator

0.12

2782

Farm

0.08

571

(a) For each occupation, construct a 95% confidence interval for the proportion who feel a lot of stress.

(b) Summarize the results. Do there appear to be certain groups of occupations with similar stress levels?

Reference no: EM131745874

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