Hard times According to a study published by the Guardian in 2018, around 7.7% of workers will
Question:
Hard times According to a study published by the Guardian in 2018, around 7.7% of workers will work at least two jobs to pay their bills.
We assume this number was calculated based on a random sample of 1000 workers.
a) Estimate the true percentage of workers who will work at least two jobs by constructing a 95% confidence interval.
b) A pundit on a TV news show claimed that only 5.8% of workers work at least two jobs. Use your confidence interval to test whether his claim is plausible given the study findings.
(https://www.theguardian.com/business/grogonomics/2019/mar/18/
more-people-than-ever-need-a-second-job-to-help-pay-the-bills)
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Related Book For 
Stats Data And Models
ISBN: 9781292362212
5th Global Edition
Authors: Richard De Veaux, Paul Velleman, David Bock
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