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An April 2004 article on HearTheIssues.com stated that Americans watch an average of 4.5 hours of television per person per day. If the standard deviation for the number of hours of television watched per day is 3.3 and a random sample of 235 Americans is selected, the mean of this sample belongs to a sampling distribution.
(a) What is the shape of this sampling distribution? [How do you know?]
(b) What is the mean of this sampling distribution? (Give your answer correct to one decimal place.)
(c) What is the standard deviation of this sampling distribution? (Give your answer correct to two decimal places.)
a certain brand of flood lamps has a lifetime that has a normal distribution with a mean of 3750 hours and a standard
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What is the probability that all three of these individuals have Alzheimer's disease? What is the probability that at least one of the three people has Alzheimer's disease?
A manufacturer claims that the mean lifetime, mean, of its light bulbs is 52 months. The standard deviation of these lifetimes is 7 months. Ninety bulbs are selected at random, and their mean lifetime is found to be 55 months.
let xij gallons of component i used in gasoline j. assume that we have two components and two types of gasoline.
in a trail of 160 patients who received 10-mg doses of a drug daily 40 reported headaches as a side effect. answer a
in pharmacologic research a variety of clinical chemistry measurements are routinely monitored closely for evidence of
Conduct the appropriate analysis to determine if there was an effect of the music on completing problems. Construct the appropriate graph to show the differences in the scores of the two groups.
your firm has 4 different manufacturing lines that each produce the same type of widget. there is a 95 percent chance
the horn on an auto operates on demand 99 of the time. assume that each time you hit the horn it works or fails
Serving in a bomber crew in World War II was dangerous. The British estimated that the probability of an aircraft loss due to enemy action was 1/20 for each mission.
Problem 1: An insurance company estimates the probability of an earthquake in the next year to be 0.0013. The average damage did by an earthquake it estimates to be $60,000. If the company offers earthquake insurance for $100, what is the insuranc..
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