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If a wildlife service wishes to estimate the mean number of days of hunting per hunter for all hunters licensed in the state during a given season, with a bound on the error of estimation equal to 2 hunting days at 95% confidence, how many hunters must be included in the survey? Assume that data collected in earlier surveys have shown sigma to be approximately equal to 10.
To determine whether there exists mean difference among the groups:
Construct a 95% confidence interval for the proportion of all those who experience some type of discomfort.
40 of unf students are male. suppose you decide to randomly select 15 unf students and observe if they are male or
questionthe table below provides summary information about students in a class. the sex of each individual and the
An independent second stage is normally distributed with a mean of 43 minutes and variance of 10 minutes. What is the probability that the two stages take over 80 minutes?
Each time that Ed charges his credit card, he omits the cents and records only the dollar value. If this month he has charged his credit card 20 times what can be said about the probability that the record shows at least $15 less than the actual a..
The graduates find a job within 1 year of graduating. What is the probability that among 9 randomly selected graduates, at least 1 finds a job within 1 year.
High levels of cockpit noise in an aircraft can damage the hearing of pilots who are exposed to this hazard for many hours. A Boeing 727 co-pilot collected 61 noise observations using a handheld sound meter. Noise level is defined as "Low" (under 88 ..
Election officials take a random sample of 100 signatures and thoroughly investigate them to find that 84% are valid. Is this statistically significant evidence that the candidate has enough valid signatures overall? Explain.
a at a local car dealership the probability of a salesman making a car sale to a customer is 0.4. the probability
question a bank recorded the number of atm transactions made by its customers in one day. the number x of daily atm
Find the percentage of the 1000 enemy that will be destroyed.
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