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Drivers stop to fill up their cars at a service station according to a Poisson process with rate λ = 15 per hour. The service station has only one gasoline pump, and there is room for only two waiting cars. We suppose that the average service time is equal to two minutes.
(b) If we suppose that an arriving driver who finds the three spaces occupied will go to another service station, what proportion of potential customers is lost?
A standard deviation of five minuts. Assuming the call times are normally distributed, what percentage of calls are longer than 35 minutes.
Classify the following as an example of nominal, ordinal, interval, or ratio level of measurement, and state why it represents this level: Gender of employees at a local warehouse.
If 4.01% of these DVD players have a life span of more than 8 years, what is the standard deviation of the DVD player's life span?
the following data show samples of three chain stores in three different locations in one town and the amount of
Define the parameter of interest, state the null and alternative hypotheses corresponding to the researchers' questions. Compute the test statistics corresponding to the hypothesis
wade retail looked at a random sample of 100 invoices from a large population. eight of these contained an error. what
so if you have a variance of 75 for a class average with a standard deviation of - 15. what grade will 96 of the class
The mean change score for the sample studied is an increase of 5.2. What is considered a medium effect size for a t test for dependent means?
Standard deviation of 8 hours. what percentage of the bulbs have lifetimes that lie within 1 standard deviation to either side of the mean?
a companys construction time follows a normal distribution. the mean time to construct a building is 100 days and the
If a manufacturer charges x dollars each for soccer balls, then he can sell 3000 - 150x soccer balls per week. Find a polynomial that represents the revenue for one week.
a lake contains 4 distinct types of fish. suppose that each fish caught is equally likely to be any one of these types.
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