- a hypnotist believes that his program can help more the 50% of patients quit smoking. to test this claim, a random sample of 100 patients were monitored for one-year and 57 had quite smoking. compute the test statistic. - a nutritionist is interested in estimating the proportion of consumers who look to purchase organic produce. how large of a sample would be necessary in order to be 99% confident that the estimate is within 3% of the actual proportion? determine the necessary sample size. - sunshine air has determined that their no-show rate for passengers booked on a flight is 6%. the airline has recently increased the cost of its travel insurance and and suspects the no-show rate for passengers will decrease. a random sample of 380 reservations resulted in 18 no-shows. at the 0.10 significance level, is there strong enough sample evidence to suggest that the no-show rate in less than 6%? conduct the appropriate hypothesis test and compute the p-value. - a survey of 400 non-fatal accidents revealed that 268 involved a distracted driver using some kind of electronic device. construct a 95% confidence interval for the proportion of non-fatal accidents involving a distracted driver using some kind of electronic device. construct the requested confidence interval. - it has been determined with 95% confidence that the proportion of americans who eat turkey on thanksgiving is between 0.78 and 0.82. determine the margin of error associated with this confidence interval.
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Category: business |
Author: Hedda Galya

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