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Do air carriers have economies of scale at any level? Economies of density ? Discuss and support your answer with examples.
The lifetimes of light bulbs of a particular type are normally distributed with a mean of 370 hours and a standard deviation of 5 hours. What percentage of bulbs has lifetimes that lie within 1 standard deviation of the mean on either side?
In the following questions, you should demonstrate your understanding of sampling distribution:
a zoo has offers to look over cost of a new lion den. the actual cost y at 200000 is predicted by the pdffx x for 0
The sample size of 8 and 10 respectively. cant it be concluded at alpha .05 that the average size of the famrs in the 2 counties are different? assume the populations are normallyh distributed.
A normal distribution with a mean of 68 years and a standard deviation of 3.5 years. What proportion of the plan recipients would receive payments beyond age 75?
the number of planes arriving per day at small private airport is a random variable having a poisson distribution with
What is the probability that a simple random sample of automobile insurance polocies will have a sample mean within 25.
Pisano et al (2005) studied the "diagnostic performance of digital versus film mammography for breast cancer screening." About 40,000 women participated in the trial; each subject was screened by both methods.
what is the difference between standard normal distribution and t-distribution?could anyone help me this
which of the following is true for a symmetrical distribution?a. mean modeb. median modec. the mean median and mode
Bob compares his SAT Verbal score of 400 to Marge's ACT Verbal score of 20. "I beat you," he exclaims. "My score is 20 times your score!" Although his multiplication is good, his logic is faulty. Explain why.
A survey found that at most 40% of those surveyed planned to get more sleep. A sample of 300 people found that 140 of them plan to get more sleep. For alpha = 0.01, what is the critical value?
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