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Customers enter the waiting line at a cafeteria on a first come, first served basis in two serving lines.
The arrival rate follows a Poisson distribution, while service times follow an exponential distribution.
If the average number of arrivals is two per minute and the average service rate of three customers per minute, what is the average time a customer spends in the queue?
Suppose that four families are surveyed and that each one reports whether its income exceeded the reported medium for that year. List the sample points.
the average score of all golfers for a particular course has a mean of 78 and a standard deviation of 3.5. suppose 49
A random sample of 700 drivers has been taken. What is the probability that between 538 and 546 of the drivers were wearing their seat belts?
a gas undergoes three processes in series that complete a cycleprocess 1-gt2 compression from p1 10 lbfin2 v1 4.0 ft3
Time and cost word processing in the first two columns of table below we repeat our data on time and cost for a sample of 5 word processing jobs. Cost($) Time (hr) y x 125 5 175 7 325 15 425 20 475 22.5
what is the t-test based on students t-distribution useful for?a. comparing values about the meanb. determining if the
A random sample of 41 basketball players from The Official NBA Basketball Encyclopedia gave the sample standard deviation for player height as s=3.32 inches.
There is a 0.05 probability of thunderstorms in a major U.S. city. If there is a thunderstorm in that city, the probability is 0.28 that a flight departing that major city will be late.
In the game of roulette, a ball is dropped into a spinning wheel, finally landing on one of the wheel's 38 different slots. The wheel has 18 black slots, 18 red slots, 1 green zero, and 1 green double-zero.
Using the SPSS data file for Module 7 (located in Topic Materials), calculate a simultaneous multiple regression with SES, age, and optimism as the independent variables and longevity as the dependent variable.
question in a given large town the number of children x in a family chosen at random has the following
In fact, the amount of coverage is known to be approximately normally distributed with a standard deviation of 25 square feet. How large a sample should be taken to estimate the true mean coverage of all 1-gallon cans to within 5 square feet with ..
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