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A communications network has a built-in safeguard system against failures. In this system if line I fails, it is bypassed and line II is used. If line II also fails, it is bypassed and line III is used. The probability of failure of any one of these three lines is .01, and the failures of these lines are independent events. What is the probability that this system of three lines does not completely fail?
in 2008 a university in the midwestern united states surveyed its full-time first-year students after they completed
a company is studying the number of monthly absences among its 125 employees. the following probability distribution
The number of cell phone minutes used by high school seniors follows a normal distribution with a mean of 500 and a standard deviation of 50. What is the probability that a student uses fewer than 400 minutes?
Use the Earthquake magnitude scale to answer how much energy in joules was released by the 2008 Earthquake in Sichuan China (magnitude 7.9) which killed 68,000 people.
1. List the advantages and drawbacks of quantum well and quantum dot intcrsubband photodctcctors.
Use Chebyshev's theorem to find what percent of the values will fall between 162 and 292 for a data set with a mean of 227 and standard deviation of 13.
there are 10 aaa batteries in a box and 3 are defective. two batteries are selected without replacement. what is the
Suppose we have the following information from a single regression: What is the coefficient of determination? What is the correlation coefficient?
Compute the indicated confidence interval for the differenciate in proportions. Suppose that the samples are independent and that they have been randomly selected.
Suppose a random sample of 25 swatches are selected. What is the probability that the mean of the sample is less than 235 pounds per square inch.
The following chart shows the hourly wages of a sample of certified welders in the Atlanta, Georgia, area. How many welders were studied? What is the class interval?
What is the probability that he finds at least one fake? What is it if the king tests 2 coins from each of 250 boxes?
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