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Question: A construction company owns six backhoes, which each break down, on average, once every 10 working days, according to a Poisson distribution. The mechanic assigned to keeping the backhoes running is able to restore a backhoe to sound running order in 1 day, according to an exponential distribution.
(a) How many backhoes are waiting for service, on average?
(b) How many are currently being served?
(c) How many are in running order, on average?
(d) What is the average waiting time in the queue?
(e) What is the average wait in the system?
Does the gender of an individual influence their gpa scores? Null: Gender does not influence gpa scores. Alternative: Gender does influence GPA scores.
State the relevant null and alternative hypotheses and calculate the appropriate test statistic. (By hand or using JMP.)
How many machines are necessary for screening in order to be certain that at least one device will detect the explosive with probability 0.999 or greater?
a national magazine claims that the average college student watches less tv than the general public. the national
Test at the 10% level of significance the null hypothesis that the mean household income of customers of the chain is $48,750 against that alternative.
Do employees take more sick leave in the year before retirement? They may well have an incentive to do so if their accumulated paid sick leave.
Number of students who graduate College every year is Normal Distribution with mean = 400 and standard deviation 50. Find probability that this year between 300 and 500 students will graduate College.
An Auditor of a small bsuiness has sampled 50 of 700 accounts. The sample mean total receivables is $435, and the sample standard deviation is $86. Find a 95% confidence interval for the total amount of receivables.
What is the formula for the exclusive range?
at parkview at any given time the probability that a randomly selected student is a female is 30. with this binomial
seventy-eight percent of the light aircraft that disappear while in flight in a certain country are subsequently
Give a 99% confidence interval for the mean increase in pay for all corporate CEOs.
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