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Question: From historical data, Harry's Car Wash estimates that dirty cars arrive at a rate of 10 per hour all day Saturday. With a crew working the wash line, Harry figures that cars can be cleaned at a rate of one every five minutes. One car at a time is cleaned in this example of a single-server waiting line. Assuming Poisson arrivals and exponential service times, find the
(a) average number of cars in line
(b) average time a car waits before it is washed
(c) average time a car spends in the service system
(d) utilization rate of the car wash
(e) probability that no cars are in the system
The following data resulted from an experiment to assess the potential of unburnt colliery spoil as a medium for plant growth. The variables are x = acid extractable cations and y = exchangeable acidity/total cation exchange capacity ("Exchangeabl..
consider a sequence of independent bernoulli trials with p0.28.a what is the expected number of trials to obtain the
A company uses triple time estimates to determine expected completion time for all of their projects. If they determined the expected time to complete a project is 25 weeks with a variance of of 9 weeks
Which group had the highest score?- Which group had the greatest range?- Which group had the greatest interquartile range?
a survey is conducted to verify whether there is a connection between smokers and cardiovascular diseases. 35 over 60
1. of 25 members of a senior honors engineering society 18 are men and 7 are women. the advisor chooses 4 of them to be
We did not study the Bernoulli distribution in any detail in Section 3, because it can be looked upon as a binomial distribution with n = 1. Show that for the Bernoulli distribution, μ'r = θ for r = 1, 2, 3, ..., by
if your anova hypothesis test shows no interaction between two factorsa you must re-run the anova in minitab without
We do not know the true mean for this population (in other words, we don't know what proportion of households are satisfied with their banana quality). However, we want to construct a 90% confidence interval for where we believe the true proportio..
Tim has two more problems to solve on his test, but he doesn't know how long it will take to finish them. He assigns mutually irrelevant normal distributions to the times
Now the organization is trying to write its report and is considering the following interpretations. Comment on 95% of all students pay between $1102 and $1290 for food.
To try to understand the reason for returned goods, the manager of a store examines the records on 40 products that were returned in the last year.
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