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The local police department must write an average of 5 traffic tickets each day to keep department revenues at budgeted levels. Suppose the number of tickets written per day follows a Poisson distribution with a mean of 6.5 tickets per day. Interpret the value of the mean.
Random samples, each of size n = 10, were taken of the lengths in centimeters of three kinds of commercial fish, with the following results.
?a) What is the standard error of the? mean? ?b) What is the critical value of? t* for a 90?% confidence? interval?
Assume the probability of a tire blowout is 0.178% per 50,000 miles of use and that a person travels 15,000 miles per year in a car.
Assume each lifetime is independent. Round your answer to four decimal places (e.g. 98.7654). What is the probability that the lathe will operate at least seven years?
construct a one-page description to introduce one-way anova. you need to mention why anova is useful how it is carried
We are investigating wallabies. We know that the overall population of adult wallabies can jump, on average, 22 feet in one leap. We find a group of 14 wallabies that are particularly tall, living off by themselves in some corner of habitat.
The daily revenue totals for the next 30 days will be monitored. What is the probability that the mean daily revenue for the next 30 days will be between $7000 and $7500?
Find the probability that randomly selected individual would spent between 30 and 40 minutes on the treadmill.
Find the standard error of the mean Also establish an interval estimate around the sample mean using one standard deviation of the mean.
If light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours, what percentage of light bulbs have a life less than 2500 hours?
Using the .05 level, what should the experimenter conclude? (a) Use the steps of hypothesis testing, (b) sketch the distributions involved.
Because the correlation between smoking and marijuana use was .45, the researcher concluded that curette smoking leads to marijuana use. Do you agree with the researcher's conclusion? Explain your answer.
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