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The useful life X of a particular kind of machine is a random variable with density function: f(x)={(2.4/x^2)+1/5 if 3≤x≤6, otherwise 0 where x is the number of years a randomly selected machine stays in use. What is the expected useful life of the machine? (Not 1)
Use your calculator to obtain a NEW simple random sample of n=5 students and record the data here.
your organization has a goal of 15 days for the average processing of a purchase request pr from notification to final
Construct a 95% confidence interval for the proportion of adults from the West who say traffic congestion is a serious problem.
What is the probability of observing 10 or more plugged defects if in fact the 3.5 average per sheet is being satisfied?
At the 0.05 level of significance, is there evidence to suggest that the population mean waiting time to check out is less than 10.73 minutes?
The firm generates $2.40 in sales per dollar of assets. What is the firm's ROE?
A university is conducting a survey in order to estimate the results of an upcoming local election. They intend to take a simple random sample of individuals from the population of eligible voters.
Find the probability that a sample of 16 tires will have an average tire life of more than 52000 miles, give that the mean tire life is 50000miles and the standard Deviation is 8489.13.
The volume of milk in a jug of milk is 128 oz. The value 128 is from a discrete data set.
Consider the following linear regression prediction equation: Y = 12 + -1(X)
ballast must weigh 150 kg. it can be made from two raw materials a with a cost of rs. 20 per unit and b with a cost of
Estimate the mean number of cars per household for the population of households in the neighborhood. Give the 95% confidence interval.
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