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Determine the sample size necessary to estimate a population proportion to within .03 with 90% confidence assuming you have no knowledge of the approximate value of the sample proportion.
What is the probability that all 3 would iPods from best buy? Or at least one would have iPod from best buy?
For each of the following problems, assume that the homogeneity of variance assumption has not been met and that you will need to use the adjusted Welch statistic.
A salesperson makes four calls per day. A sample of 100 days gives the following frequencies of sales volumes.
Perform a hypothesis test with significance level 5%. Show all work, and clearly state your conclusion.
Using the results, describe the effect of an outlier or extreme value on the confidence interval.
The Greenberg public hearing meeting turned stormy. Citizens from four suburbs were gathered at city hall to try to get the city's federal funds for their own suburbs. The government recently awarded $750,000 to the city for road improvements. The..
First part of this theorem allows a problem solver to compute probabilities about sample means regardless of whether a population is normally distributed.
Multiple choice questions based on multiple regression - Find the coefficient of determination for the above model
Based on this sample, is Moe correct in his assertion? Write up formal commentary of results of your test.
A person must score in the upper 2% of the population on an IQ test to qualify for member ship in Mensa, the international high-IQ society. If IQ scores are normally distributes with a mean of 100 and a standard deviation of 15, what score must a ..
A certain type of injury has tangible costs of $40,000 per occurrence and intangible costs of $150,000 per occurrence. Perform a cost/benefit analysis to weigh the benefits of the proposed safety glasses policy against its expected costs.
The Air Transport Association of America published figures on the busiest airports in the United States. The following frequency distribution has been constructed from these figures for the year 2000.
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