Suppose in 2011 a survey of 1037 workers in the city of Vancouver found that 225 used public transport to commute to work. Part (a) Estimate the percentage of workers in Vancouver who use public transport to commute to work. Give your answer in percentages (without the percentage sign, and to four significant digits). Part (b) Find a 95% confidence interval for the percentage of workers in Vancouver using public transport to commute to work. Use the sample proportion in your estimate of the standard error. Provide the upper and lower bounds for your confidence interval. Give your answer in percentages (without the percentage sign, and to four significant digits) (

A First Course in Probability (10th Edition)
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Suppose in 2011 a survey of 1037 workers in the city
of Vancouver found that 225 used public transport to
commute to work.
Part (a) Estimate the percentage of workers in
Vancouver who use public transport to commute to
work. Give your answer in percentages (without the
percentage sign, and to four significant digits).
Part (b) Find a 95% confidence interval for the
percentage of workers in Vancouver using public
transport to commute to work. Use the sample
proportion in your estimate of the standard error.
Provide the upper and lower bounds for your
confidence interval. Give your answer in percentages
(without the percentage sign, and to four significant
digits) (
Transcribed Image Text:Suppose in 2011 a survey of 1037 workers in the city of Vancouver found that 225 used public transport to commute to work. Part (a) Estimate the percentage of workers in Vancouver who use public transport to commute to work. Give your answer in percentages (without the percentage sign, and to four significant digits). Part (b) Find a 95% confidence interval for the percentage of workers in Vancouver using public transport to commute to work. Use the sample proportion in your estimate of the standard error. Provide the upper and lower bounds for your confidence interval. Give your answer in percentages (without the percentage sign, and to four significant digits) (
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