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The time to failure of an electrical component in constant failure rate mode follows an exponential distribution with a mean time to failure of 6000 hours. What is the probability that the average time to failure for 30 randomly chosen components will be less than 5000 hours?
a distribution with a mean of u64 and a standard deviation of4 is being transformed inot a new standarized
Mr. Pickwick takes his umbrella. When rain is not forecast, he takes it with probability 1/3. Find: (a) the probability that Pickwick has no umbrella, given that it rains.
suppose you just received a shipment of thirteen televisions. three of the televisions are defective. if two
Suppose that the population of heights of female college students is approximately normally distributed with mean m of 66.24 inches and standard deviation s of 5.07 inches.
Assume salaries are normally distributed with a standard deviation of $4,500. What is the probability of a new graduate receiving a salary between $45,000.
Use your results from #2 as estimates for μ and σ. Find the probability that a sample of 36 statistics students at DTCC has a height of 65 inches or taller.
They wish to conduct a survey of their students and find a simple random sample of 50 Freshmen, 40 Sophomores, 35 Juniors, and 30 Seniors.
We are interested in determining whether or not the opinions of the individuals (as to Yes, No, and No Opinion) are uniformly distributed.
A standard deviation of 1.00 degrees C. Find the probability that a randomly selected thermostat reads greater than -0.74 and draw a sketch of the region.
A particular product is known to have an exponential failure time distribution with a mean of 12 months.
If a random sample of 40 customers is taken, what is the probability that the sample average expenditure per customer for this sample will be 87.00 or more?
What percent of the sales representatives earn more than $42,000 per year? What percent of the sales representatives earn between $32,000 and $42,000?
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