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Suppose a penny arcade worker is in charge of keeping ten machines in operation. The failure rate of each machine follows an exponential distribution with a mean time of ten hours and the time required to repair each machine follows an exponential distribution with a mean time of thirty minutes. Over the long run, approximately what percentage of machines, on average, will be operating?
a. 76.5%
b. 92.4%
c. 53.8%
d. 46.2%
e. None of the above
If the agent has enough time to contact only 15 customers, how confident can she be of selling all four houses within the available time?
A City Survey states that 70 percent of all business owners favor increasing the parking fees. The city has commissioned a random sample of n = 100 business owners.
If you have a population that has a small sample, but does not meet all of the criteria for the nonparametric test how can you tell what test to use?
The frequency distribution below shows the distribution for suspended solid concentration (in PPM) in river water of 50 different waters collected in September 2011.
Determine the centerline and the upper and lower control limits for a 3-sigma mean control chart in which each sample consists of 4 cylinders
In a study comparing individual performance with group performance, Laughlin, Zander, Knievel, and Tan found that groups consistently outperformed the best of the individuals.
motorola used the normal distribution to determine the probability of defects and the number of defects expected in a
Because of a recent incident in which a number of people became ill after eating undercooked hamburger meat, intensive interest has centered around the cooking time for hamburger patties.
A larg wholesale nursery sells shrubs to a retail store. The cost C(x) and revenue R(x) in dollars for x shrubs are listed below:
jinbao produces tubas and ships them in lots of twenty. suppose that 60 of all such lots contain no defective tubas 30
suppose you open a new game at the county fair. when patrons win you pay them 3.00 when patrons lose they pay you 1.00.
According to an exit poll taken by CNN during the 2008 Democratic Primary in Connecticut, 552 registered voters voted for Hilary Clinton and 598 for Barack Obama. Would you have been willing to predict Obama as the winner?
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