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A tire company made a sampling distribution on one of its brands of tires and determined that the tire had a mean life of 56,000 miles with a standard deviation
The probability that a person is immune to a certain disease is 0.40.
Acme Plumbing Supply has just received a shipment of 5,000 valves for chemical plants, where regular steel valves would corrode.
Let X be a Poisson random variable with parameter (lambda). Show that P {X=i} increases monotonically and then decreases monotonically as i increases
The manager of a restaurant claims that only 3% of the customers are dissatisfied with the service. If this claim is true, what is the probability
Merican air flight 2705 from N.Y. to San Francisco has seats for 340 passengers. An average of 7% of the people with reservations do not show up
Determining whether rain on consecutive days is an independent phenomenon
A researcher is studying IQ levels. From past experience she knows the population mean IQ for adults is 110 and the standard deviation is 15.
A survey of workers in the U.S. found that 2.9% work more than 70 hours per week. You randomly select 10 workers in the U.S
A coin is tossed 20 times. Find probability of getting at least 14 heads.
A wheel with the following probabilities is spun:
A new component for an airplane is being manufactured. Each has a 70% probability of working properly. A sample of 8 components is sampled
Suppose a sequence of independent trials is performed where each trial results in either success or failure.
A bowl contains R red and W white chips. Suppose N chips are drawn without replacement from the bowl.
The camera department of a large department store sells three different brands of cameras: Proxima, Yakima, and Tetron
A group of day to day workers can work either 0 hours, eight hours or 12 hours at a pay rate of $9.75 per hour
Assume that you are the owner of a small business that employs two people on a telephone help desk. Records show that one of the employees is busy
The ages of the volunteer members of fire department are normally distributed with a mean of 36 and a standard deviation of 6. What is the probability
A wildlife biologist captures a certain species of geese in orer to weigh them. Using science, he determines that the weights are normally distributed
On February 8, 2002, the Gallup Organization released the results of a poll concerning American attitudes
A videotape store has an average weekly gross of $1,158 with a standard deviation of $120. Assuming this to be a normally distributed random variable
A survey revealed that 21.5% of the households had no checking account, 66.9% had regular checking accounts, and 11.6% had NOW accounts
Because of a recent incident in which a number of people became ill after eating undercooked hamburger meat, intensive interest has centered
The Census Bureau reports that 55% of all 3-to-5-year-old children attended preschool programs at least a portion of the day.
On any given day the number of leasable square feet of office space available in a small city is a normally distributed random variable witha mean of 850,000