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Suppose that the time to failure of a particular part in a system has an exponential distribution with expected time to failure of 5 minutes. Also suppose there is a machine which replaced a failed part instantaneously upon failure. Thus the system can keep operating even with failing parts. What is the probability that it would take more than 10 minutes (starting right after a part has been replaced) to have replaced four parts?
a batch of 20 used automobile alternators contains 4 defectives. if 3 alternators are sampled at random find the
according to a government study among adults in the 25- to 34-year age group the mean amount spent per year on reading
A farmer in Iowa owns 45 acres of land. He is going to plant each acre with wheat or corn. Each acre planted with wheat yields $200 profit, requires 3 workers, and requires 2 tons of fertilizer; each with corn yields $300 profit, requires 2 worker..
Assume a customer has a two-attribute value function for cars: cost and quality. Cost can range from $5,000 to $10,000 and quality can range from 0 to 10 (a higher score is better).
question 1 suppose that 11 individuals take the gmat graduate management admission test then take a gmat preparation
At the 5 percent level of significance, can we conclude that the mean weight is greater than 16 ounces? Determine the p- value.
A study was conducted to estimate the mean amount spent on birthday gifts for a typical family having two children. A sample of 195 was taken, and the mean amount spent was $210.97.
1.a sociologist is studying the effect of having children within the first three years of marriage on the divorce rate.
Scientist would like to know if mental health clients of private versus public service agencies differ on Global Assessment of Functioning (GAF) scores and on Satisfaction with Services (Satisfaction). She has collected data for 34 clients from a ..
30 in Canada, and 6 in the United State. At level of significance 0.05, test whether the distribution of sales has changed from last year.
suppose that in bags of christmas mampms half of the mampms are supposed to be red and the other half green. in a bag
With a population standard deviation of $7810. Use α = 0.01 to test the researcher's theory. Assume wages in this industry are normally distributed, determine the 99% confidence interval of the population mean.
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