Question
A researcher sampled 200 people who work in computer-related jobs, and found that 42 of them have changed jobs in the past year. A. Compute
A researcher sampled 200 people who work in computer-related jobs, and found that 42 of them have changed jobs in the past year.
A. Compute a 95% confidence interval for the true proportion of people who work in computer-related jobs and have changed jobs in the last year.
B. In a previous study, it has been found that at most 20 % of people who work in computer-related jobs changed jobs in the past year. How many people with computer-related jobs must be sampled to be 95 % confident that the true value of the proportion is within 2% of the point estimate?
Step by Step Solution
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Step: 1
a Using the formula below we can determine the confidence interval for a population proportion p z p ...
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Essentials of Econometrics
Authors: Damodar Gujarati, Dawn Porter
4th edition
73375845, 978-0071276078, 71276076, 978-0073375847
