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1. The firm you work for has a rather poorly-thought-out policy that any estimations of the cost of a certain activity must be within a margin of error of no more than ± 10% of the estimated cost. (The company doesn't care about the confidence level of the margin of error, only that it be such that the above rule is upheld.) A project that you're working on has an average cost of $10,000, which was derived from a sample of all 11 known observations with a known standard deviation of 1,869. To comply with your company's policy, what is the highest confidence level you may use to construct this margin of error? (Estimate this by using the chart above to give the two points which it must fall in between, or the extreme point if it is greater/less than all those given.)
2. You work in an IT firm that specializes in a certain sort of information retrieval for corporations. Your boss has assigned you the task of estimating how long a certain sort of advanced retrieval takes on average. Since a major business is seriously considering an account with your company, your boss wants you to be "99 percent sure" that your estimate falls within a 10-point total spread that you will give him. The variance of these sorts of retrievals is known to be 4800. What is the least number of trials of the system that you would have to run to complete your task (using the techniques that this test covers)?
The board of directors of Saner Automatic Door Company consists of 12 members, 3 of whom are women.
At the 0.01 level of significance, is there evidence to support the professor's claim?
This assignment involves displaying an understanding of an independent t-test. Based on my hypothetical research question: What do early childhood educators report about their experiences with fathers' involvement in their programs?
a government agency uses a few new scooters for each model every year to collect data on the pollution emission and
If light bulbs failure times are identically and independently distributed, what shape would you expect for the hazard function of the light bulbs? Draw a picture and explain.
a young boy asks his mother to get five game-boy cartridges from his collection of 10 arcade and 5 sports games. how
An auto manufacturer advertises that "90% of the cars we've ever made are still on the road." Assuming this is literally true, how can it be explained?
under appropriate conditions the sampling distribution of the z-statistic is approximately a standard normal
a division within a transportation company is responsible for performing maintenance on the fleet of trucks used by the
An investigator analyzed the leading digits of the amounts from 200 checks issued by three suspect companies. Calculate the χ2 test statistic. Calculate the χ2critical value
What is the relationship between the sign of the correlation coefficient and the sign of the slope of the regression line?
Solve the linear programming model by using the computer. Identify the sensitivity ranges for the objective function coefficients and explain what the upper and lower limits are.
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