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Assume that owning and operating a certain machine to till 850 acres results in an ownership cost of $5,000 per year plus operating costs of $5.00 per acre including labor. Leasing a machine with a field capacity of 5.0 acres per hour to do the same work would cost $40 per hour, plus the same operating costs. Hiring the work done on a custom basis would cost $12 per acre. Which alternative has the lowest total cost?
How much time does it take on the average from the moment a plane joins the queue until it lands and clears the runway?
You choose random sample of 50 cans, and mean amount of paint per 1-gallon can is 0.995 gallon. Is there evidence that mean amount is different from 1.0 gallon (use α=0.01).
The proportion of middle managers leaving large IT companies within three years is to be estimated within 3 percent. The 0.95 degree of confidence is to be used. A study conducted several years ago revealed that the percent of managers leaving wit..
A school accepts the top 10% of the applicants based on the entrance exam. The scores are normally distributed with a mean of 88 and a standard deviation of 3. What is the cutoff score to be admitted to the school?
Consider each of these situations. Do you think the proposed sampling method is appropriate? Explain.- We want to know if there is neighborhood support to turn a vacant lot into a playground.
What fraction of the manufacturer's shafts are likely to be rejected? If the manufacturer improves her quality control, she can reduce the value of σ.
the proportion of public accountants who have changed companies within the last three years is to be estimated within
How has the internet and social media like Facebook, and twitter contributed to social awareness, especially in developing countries.
If 30% of the athletes have been disqualified in previous terms, what is the probability that a randomly selected athlete will be disqualified during the next grading period?
a statistics practitioner would like to estimate a population mean to within 40 units with 99 confidence given that the
allante pizza delivers pizzas throughout its local market area at no charge to the customer. however customers often
The U.S. Department of the Interior releases figures on mineral production. Following are the 14 leading states in nonfuel mineral production.
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