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Suppose a penny arcade worker is in charge of keeping ten machines in operation. The failure rate of each machine follows an exponential distribution with a mean time of ten hours and the time required to repair each machine follows an exponential distribution with a mean time of thirty minutes. Over the long run, approximately what percentage of machines, on average, will be operating?
a. 76.5%
b. 92.4%
c. 53.8%
d. 46.2%
e. None of the above
a standard deck of cards contains 52 cards. one card is randomly selected from the deck.a. compute the probability of
In a sample of 55 mice, a biologist found that 42% were able to run a maze in 30 second or less. Find the 90% limit for the population proportion of mice who can run a maze in 30 second or less.
What is the probability that 19 from a sample of 22 shoppers will spend less than $20? What is the probability that at least 12 but not more than 17 from a sample of 22 shoppers will spend less than $20?
for a lawyer 10 clients come to see her on average every day. the time of talking to each customer follows an
A local bank reported to the federal government that its 5,246 saving accounts have a mean of $1,000 and standard deviation of $240.
Create and attach a normal curve to this document with the following elements: the normal curve, a label of the average number of shoppers, and labels for the sample means of 441 and 446 shoppers. Include all the appropriate symbols.
Categorize the following as discrete or continuous random variables.
What is an estimate of the proportion defective for the piston manufacturing process when it is control?
Given that the student you choose is a senior, find out the probability of selecting a non-senior?
Categorize the events as dependent or independent. Events A and B where P (A) = 0.7, P (B) = 0.8, and P (A and B) = 0.56.
measuring disease frequency in 2000 the crude mortality rate from all causes for haiti a very impoverished country was
Based on the information in (a), find a one-sided lower 90% confidence limit for m. Also, find a one-sided upper 90% confidence limit for m.
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