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Question: How would the reliability of the system in Exercise 4.4.23 change if the reliability of unit 3 were changed from 0.93 to 0.96? What change if the reliability of unit 2 were changed from 0.90 to 0.95 (with unit 3 unchanged)?
Exercise: A system has eight components with respective probabilities
0:96 0:90 0:93 0:82 0:85 0:97 0:88 0:80
Units 1 and 2 form a parallel subsytem in series with unit 3 and a three of five combination of units 4 through 8. What is the reliability of the complete system?
Find the area to the right of z = 0.85 under the standard normal curve.
The researchers found that 69 of the 172 sampled streams had a substrate of shale. Construct a 95% confidence interval for the proportion of Adirondack streams with a shale substrate. Clearly interpret your interval in this context.
a researcher knows that the population mean among college students taking social conformity test is neutral100. scores
You want to design a sampling scheme to determine whether the process is under control. To inform you in this decision, you need to calculate a few probabilities based on a binomial distribution:
1. explain the relationship between variance and standard deviation. can either of these be negative?expline2. find the
a scientist testifying before a congressional hearing on the effects of estrogenic pesticides told every man in the
The possibility of terrorists using biological weapons on the citizens of the United States has been a major topic in the press for the last several years. Smallpox has been speculated to be the perfect biological terror agent because of the poten..
A mathematics professor has two umbrellas, both of which were originally at home. The professor walks back and forth between his home and office, and if it is raining when he starts a journey, he carries an umbrella with him unless both his umbrel..
What is the probability that our survey will (erroneously) indicate that Pepsi is preferred by more people than Coke?
the relationship assumed linear between yield of bourbon y and aging time x was studied by observing yields yi from
medical treatment will cure about 87 of all people who suffer from a certain eye disorder. suppose a large medical
Suppose that a simple random sample of n = 5 plots is selected from a study area of N = 100 plots and that the numbers of animals detected in the five plots are 10, 7, 0, 0, and 5, but that the probability of detection for any animal in a selected..
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