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The distribution of room and board expenses per year at a four-year college is normally distributed with a mean of $5850 and standard deviation of $1125. Random samples of size 20are drawn from this population and the mean of each sample is determined. Which of the following mean expenses would be considered unusual?
Other questions we might want to ask about pooling similar populations: Do all the subpopulations have the same ratio of yellow to green seeds? Does the average ratio deviate from our hypothesized ratio?
the tread life of a particular brand of tire is a random variable best described by a normal distribution with a mean
to determine if a new medication to lower blood pressure in adults would have the unpleasant side effect of weight gain
The Bureau of Labor Statistics reported that the average annual income of dentists in the year 2005 was $110,000. A sample of 81 dentists, which was taken in 2006,
b. Order from Zug is $1,840,000 as just calculated. The expected cost of offsetting the hedged cash flows is $100,000 as explained next. Brooks sold A$1 million forward. It will purchase them in the spot market and then will fulfill its forward co..
a study found that foot lengths for japanese women are normally distributed with a mean of 24.9 and a standard
a shipping company claims its boxes can carry 36 lb. the production design allows the boxes to be uniform in
a family plans to have 3 children. for each birth assume that the probability of a boy is the same as the probability
the mean gross annual income of certified welders are normally distruted with the mean of 20000 and a standard
a law requires the average level of co carbon monoxide in city air to be no more than 9 parts per million ppm. a
create the confidence interval for sigma2 using the data from problem 1 with 005. the endpoints of the confidence
a production process is set to manufacture bolts with a diameter of .5 inches. the process has a standard deviation of
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