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The GO transportation system of buses and cumuter trains operates on the honor system. Train travers are expected to buy their tickets before boarding the train. Only a small number of people will be checked on the train to see weather they bought a ticket.
A) Suppose that a random sample of 400 train travelers was sampled, and 68 of them had failed to buy a ticket. Estimate with 95% confidence the proportion of all train travelers who do not buy a ticket.
B) Assuming that there are 1 million travelers per year and the fare is $3, estimate with 95% confidence the amount of revenue lost each year.
Construct and interpret a 95% confidence interval for the mean score on this exam question. Follow the Inference Toolbox.
in each of the following situations the sampling frame does not match the population resulting in undercoverage. give
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a researcher is evaluating the influence of a treatment using a sample selected from a normally distributed population
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