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?