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The maintenance manager at a chemical facility knows that the days between repairs for a specic chemical reactor, denoted by the random variable Y , are well modeled by the distribution with density:
f(y)=0.05e^-0.05y
a. What is the probability that she will need to wait less than 30 days?
b.What is the probability that a repair will be needed sometime after the next 15 days?
c.Given that the chemical reactor has remained operational for the past 50 days, what is the probability that it will fail within the next 50 days?
A financial advisor has recommended two possible mutual funds for investment: Fund A and Fund B. The return that will be achieved by each of these depends on whether the economy is good, fair, or poor.
in a partially destroyed laboratory record of an analysis of correlation data the following results are legible
Random samples of five hundred units that were selected daily from a manufacturing process produced an overall defective rate of 3.5%. Calculate the lower and upper control limits for a percentage control chart.
It is estimated that 3% of the athletes competing in a large tournament are users of an illegal drug to enhance performance. The test for this drug is 90% accurate.
What are the expected value and standard deviation of the number of small aircraft that arrive during a 90-min period?
Discuss the link between the estimate and the parameter in the context of an hypothesis test. Be sure to reference the appropriate steps of the five step process in your response, based on the steps below:
Conduct a marketing experiment in which students are to taste one of two different brands of soft drink
according to the records of an eletric company sering the boston area the monthly electric consumption during winter
Using a level of significance of .05, is there evidence that the dual degree students are receiving lower grades? Fully explain your answer.
iq as measured by an intelligence test is scaled so that the mean in the population is 100 with a standard deviation of
The changes on different days are assumed to be independent. What is the probability that after 2 days the stock will be at its original price? What is the probability that after 3 days the stock's price will have increased by 1 unit?
Probability calculations reveal the following information. The probability of a favourable research report = 0.59. The probability of high sales given a favourable research report = 0.95. The probability of high sales given an unfavourable research r..
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