A sociologist sampled 200 people who work in computer-related jobs, and found that 42 of them have
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A sociologist sampled 200 people who work in computer-related jobs, and found that 42 of them have changed jobs in the past 6 months.
a. Construct a 95% confidence interval for the proportion of those who work in computer-related jobs who have changed jobs in the past six months.
b. Among the 200 people, 120 of them are under the age of 35.
These constitute a simple random sample of workers under the age of 35.
If this sample were used to construct a 95% confidence interval for the proportion of workers under the age of 35 who have changed jobs in the past six months, is it likely that the margin of error would be larger, smaller, or about the same as the one in part (a)?
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