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A study looked into the management of various tropical grasses for improved production, measured as dry matter yield in hundreds of pounds per acre over a 54-week study period. The management variables were height of cut (1, 3, or 6 inches), the cutting interval (1, 3, 6, or 9 weeks), and amount of nitrogen fertilizer (0, 8, 16, or 32 hundred pounds of ammonium sulfate per acre per year). Forty-eight plots were assigned in completely randomized fashion to the 48 factor-level combinations. Dry matter yields for the plots are shown in the table below (data from Richards 1965). Analyze these data and write your conclusions in a report of at most two pages.
A company that relies on Internet-based advertising linked to key search terms wants to understand the relationship between the amount it spends on this advertising and revenue (in $).
To find the 95 percent confidence interval for the true population mean. From the results below, is it true that 95% of the sample means will fall
A shipment of 250 netbooks contains 3 defective units. Determine how many ways a vending maching company can buy three of these units and receive a) no defective units b) all defective units c) at least one good unit.
A class has 13 women and 18 men. If student if selected randomly, determine the probability student is a woman?
An underground vault near Paris contains a cylinder made of iridium and platinum. By definition it weighs one kilogram. Would ownership of this cylinder provide you with market power? Would you be a monopolist?
the random variable x the time to failure in thousands of miles driven of the signal lights on an automobile has a
He wants to be 95% confident that his estimate is correct. If the standard deviation is $1050, how large a sample is needed to get the desired information and to be accurate within $200?
a local pizza restaurant and a local branch of a national chain are located across the street from a college campus.
Based on sample data, the 95% confidence interval for the population mean is from $150 to $250.
an investigation of the effectiveness of a training program to improve customer relationships included a pre-training
Suppose that the contestants are numbered 1 through 2n, and that whenever two players contest a match, the lower numbered one wins with probability p. Also suppose that the pairings of the remaining players are always done at random so that all po..
an exhaustive survey of all users in a wilderness park taken in 1980 revealed that the average number of persons per
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