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At a successful garage, there is always a backlog of cars waiting to be serviced. The service times of cars are iid exponential random variables with a mean service time of 30 minutes. Find the PMF of N(t), the number of cars serviced in the first t hours of the day.
(a) State the hypothesis for a right-tailed test. (b) Obtain a test statistic and p-value assuming equal variances. Interpret these results. (c) Is the difference in mean scores large enough to be important?
What is the approximate probability that the total weight of the passengers exceeds 4000 pounds? Use the four-step process to guide your work.
To test whether the significant difference between two proportion test using large sample test.
assume that a procedure yields a binomial distribution with a trial repeated ntimes. use a binomial probabilities table
Pearson correlation coefficient was 0.61.a. Was the correlation coefficient significantlydifferent from zero? Use α = 0.05.b. Predict the torque for a current equal to 50 mA.
suppose that a popular hotel for vacationers in orlando florida has a total room of 300 identical rooms. as many major
a six-sigma black belt quality control engineer found that in a random sample of 140 printed circuit boards 18 are
a large furniture store furniture store has begun a new a ad campaign on local tv. before the campaign the long term
Analyze Unemployment Rates in Australia Between 1995 and 2008
Make a point estimate of the population mean difference in endurance after taking the herbs. Make a 95% confidence interval estimate of the population mean difference.
Find the probability that you will (a.) make your first sale on your fifth call, (b.) make your sale on the first, second or third call, and (c.)do not make a sale on your first three calls.
Suppose a major real estate development corporation has hired you to research the features of housing for which people will pay the most in making a home purchasing decision.
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