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Winning marathon times. Chance (Winter 2000) published a study of men's and women's winning times in the Boston Marathon.
The researchers built a model for predicting winning time (y) of the marathon as a function of year (x1) in which the race is run and gender (x2) of the winning runner. Classify each variable in the model as quantitative or qualitative.
If the sample size had been 15 rather than 40, could the probability requested in part (a) be calculated from the given information?
a company is studying the feasibility of buying an elevator for a building under construction. one proposal is a
If you sample 100 oranges and find that sample mean weight to be 3.7 oz, would you doubt the statement that the orange comes from the population with mean weight of 4.0 oz and standard deviation of 1.0 oz? Justify your answer.
Does it appear that the process was in control throughout? If not, determine revised control limits if possible.
How heavy does a box have to be in order for the box to be labeled overweight?
A shipping form keeps 2 cars in readiness for local delivery. Because of demands on their time and the frequency of mechanical failure, the probability that a particular car will be available when needed is 0.9.
the reliability of a computer system is often measured in terms of life-length of a specific hardware component. in
Describe the difference between quantitative and mixed methods, what are the general advantages and disadvantages of the two research approaches featured in the articles.
The distribution of bladder volume in women is approximately N(400,75) in milliliters. Find the proportion of women's bladders with a volume between 500 and 600m.
It is known that the standard deviation of the population of checkout times is one minute. With a .95 probability, the sample mean will provide a margin of error of?
Develop the appropriate null and alternative hypotheses and what is the Type I error in this situation? What are the consequences of making this error?
According to Honda Motor Co., Inc., the exchange rate (yen per U.S. dollar) from 1998 through 2005 was 123, 128, 112, 111, 125, 122, 113, and 108. Determine the mean and median for these data. Is there a mode? If so, what is its numerical value?
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