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Given a Uniform Distribution for a random variable X on the interval 1 to 11. What is the probability for X being greater than 5 and less than 7? What is the probability that X is greater than 6?
What is the difference between a one-tail and a two-tail test? How do we identify each? What is meant by a p-value?
an electronic switching device occasionally malfunctions and may need to be replaced. the device is considered
Ten bolts were selected randomly from a production line and the diameter of each was measured. Why do these diameters not have a binomial distribution?
Rental car gasoline prices per gallon were sampled at eight major airports. Date for Hertz and National car rental companies follow (USA today April 4, 2000)
Interpret the results at α = .01. (c) Is normality assured? (d) Is the difference large enough to be important? (e) What else would medical researchers need to know before prescribing this drug widely?
The bus averaged 40 mph on the drive from Columbus to Athens but averaged 60 mph during the return trip. What was the average speed of the bus for the entire trip?
in a study designed to investigate whether chimpanzees could learn sign language four chimps were taught ten signs of
Fitting of simple linear regression equation - Given the student population for a school district over the past few years, find the prediction equation for this data.
Meagan Dubean manages a portfolio of 200 common stocks. Her staff classified the portfolio stocks by 'industry sector' and 'investment objective. If x is a binomial random variable with n=8 and p=0.6, what is the probability that x is equal to 4?
Is this sample sufficient to conclude that the children with a history of preschool day care are significantly different from the general population? Use a two-tailed test with α=.01.
a pump is designed to move water and deliver to a vertical distance of 80m what energy per kg of water must be supplied
A sample standard deviation = 5.60 hours, find the upper limit of a 98% confidence interval estimate of the true population mean life.
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