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The amount of flour used per day by a bakery is a random variable X that has an exponential distribution with mean equal to 4 tons. The cost of the flour is proportional to Y=3X+1.
a) Find the p.d.f of Y.b) Use the answer in (a) to find E(Y).
Sample is found to have a mean of 80.6,a standard deviation of 1.4 test the claim that the true mean of this process is different than 80. use 10% level of significance.
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A survey of 10 different suburbs in Dallas Texas found the average gasoline to be $ 1.294 a gallon with a standard deviation of $ .0526. What is the critical value using a=.
It is claimed that two of three Americans say that the chances of world peace are seriously threatened by the nuclear capabilities of other countries. If in a random sample
If we repeated this procedure many, many times, only 5 percent of the 95 percent confidence intervals would fail to include the mean Math SAT score of the population of all
Suppose that we modify the M/M/2 queueing system as follows: when a server is free, he assists (if needed) the other server, so that the service time, S, has an exponential
Is this a one-tailed or two-tailed test? Explain.- Write the null and alternative hypotheses.- In this context, explain what would happen if the professor makes a Type I error
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