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You are flying a four-engine aircraft on a 10-hour flight. Assume that it has been established that the probability of an engine of the type you have on your aircraft failing during a 10-hour flight is 0.008. Determine the probability of all four engines failing during the flight.
A student decided that this is a binomial distribution problem. The student found that the probability of all four engines failing is 4.1E-09. Is that answer correct?
The McNemar test is a test on a 2x2 classification table when you want to test the difference between paired proportions. Chi-square test for 2X2 tables compares the tallies or counts of categorical responses between two (or more) independent grou..
A method of determining if relationships exist between two variables is:
If the confidence interval limits do not include age below 20 does it mean that motor cyclists under the age of 20 rarely die in crashes?
A chance sample of 50 families revealed an average or median of $112,000 and a standard deviation of $40,000. What is the standard error of the average or median?
Downs and Abwender (2002) evaluated soccer players and swimmers to determine whether the routine blows to the head experienced by soccer players produced long-term neurological deficits.
What value is business research and hypothesis testing to a company? What is the "perfect" standard normal distribution? Explain your answer.
Patient does not have disease occurs 1% of the time. If a randomly selected individual is positive what is the probability that the individual has the disease?
A survey of Ohio University students was conducted to determine if there was a particular Green that was desired by students to live on. A sample of students responses are reproduced below. Do students prefer a particular Green? Use critical value..
Normal distribution with average 500 and SD 100. A college wants their students to be in the top 12.5% for verbal aptitude. What minimum qualifying score should they set?
Given the following frequency distribution, find out the mean, variance, and standard deviation.
If the company's report is correct, what is the probability that the average balance of an account in the sample is $394 or less?
A random variable X that has pmf given by p(x) = 1/ (n+1) over the range Rx = {0,1,2,...,n} is said to have a discrete uniform distribution. Find the mean and variance of this distribution.
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