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Policy Pollsters is a market research firm specializingin political polls. Records indicate in past elections,when a candidate was elected, Policy Pollsters hadaccurately predicted this 80 percent of the time andthey were wrong 20% of the time. Records also showfor losing candidates, Policy Pollsters accurately predictedthey would lose 90 percent of the time and theywere only wrong 10% of the time. Before the poll istaken, there is a 50% chance of winning the election.If Policy Pollsters predicts a candidate will win theelection, what is the probability that the candidate willactually win? If Policy Pollsters predicts that a candidatewill lose the election, what is the probability thatthe candidate will actually lose?
A certain component is critical to the operation of an electrical system and must be replaced immediately upon failure. If the mean lifetime of this type of component is 100 hours and its standard deviation is 30 hours, how many of the components ..
Certo has complained that he was misrated on his January mission. Both ratings should be 10's, he claims to the chief, who agrees and recomputes the schedule. Do any changes occur over the schedule set in part (b)? What are the strengths and weakn..
The mean of a normal probability distribution is 60; the standard deviation is 5.
The city of Vancouver Office of Emergency Management reported that 911 operators receive an average of 7.2 calls per hour. Assume that the number of 911 calls follows Poisson distribution
all seasons plumbing has two service trucks that frequently need repair. if the probability the first truck is
If you were using the relative frequency of an event to estimate the probablility of the event, would it be better to use 100 trials or 400 trials according to the law of large numbers?
cereal is sold by weight not volume. this introduces variability in the volume due to settling. as such the height to
question a production run of toothpaste requires a fixed cost of 100000. the variable cost per unit is 3.00. if 50000
shortly after starting the laundry you realize that you cannot nd your iphone 6 that contains your only complete set of
The lifetimes of light bulbs of a particular type are normally distributed with a mean of 370 hours and a standard deviation of 5 hours. What percentage of bulbs has lifetimes that lie within 1 standard deviation of the mean on either side?
the national sporting goods association conducted a survey of persons 7 years of age or older about participation in
If he succeeds he will obtain 2000 US dollars. suppose that thief currently has 1500 US dollars in his pocket. Compute expected value of this undertaking.
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