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A piece of electronic equipment is built with 3 cooling fans. The equipment will function only if at least 2 of the 3 pans are working. The lifetimes of the fans are subject to forces of mortality that are independent, constant and identical. The force of mortality is equal to 0.098. Calculate the probability that the electronic equipment will work for at least 5 years.
In a normal distribution with mean 59 and standard deviation 22, how large a sample must be taken so that there will be at least a 90 percent chance that its mean is greater than 53?
a government task force suspects that some manufacturing companies are in violation of federal pollution regulations
assume that a womens heights are normally distributed with a mean given by u 63.2 and a standard deviation given by
A financier whose specialty is investing in comedy shows has observed that, in general, shows with "big- name" stars seem to generate more revenue than those shows whose stars are less well known.
in 2011 a sruvey by the american bar association indicated that the average yearly income of attorneys was 110000. a
let x be a random variable corresponding to the sum of the numbers on two fair dieshints 234....12 find the probability
consider an x-bar chart where the x-bar statistic is normally distributed and an associated x-bar control chart exists.
we all know that utilitarianism seeks the good for the majority of people. based on what you learned from chapter 2 we
Establish a 99% confidence interval for the difference in the proportion of suburban and urban housewives who own IPod.
High temp for January 1st is normally distributed with a mean of 40 degrees and a standard deviation of 5 degrees.
The state's smallest animal is a red-tailed gerbil, with a mean weight of 2.5 grams and a standard deviation of 0.25 grams. Assuming that the weights are normally distributed
iq is normally distributed with a mean of 100 and a standard deviation of 15. suppose one individual is randomly
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