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The 2011 gross sales of all firms in a large city have a mean of $2.3 million and a standard deviation of $0.6 million Using the Chebysev's theorem, find at least what percentage of firms in this city had 2011 gross sales of $1.1 to $3.5 million.
A single experiment generates a random value from this distribution. If the experiment is repeated many times, what will be the approximate value of the mean of these random variables? Give a reason for your answer.
Based on your answers to a through d, decide whether or not to reject the null hypothesis at the given significance level. Explain your conclusion in the context of the problem.
A statistics student wants to predict the annual salaries of employees at one large company. He wants to know if he can use the number of years that someone has worked at the company to predict his or her annual salary.
Devise a simple coding system to do a content analysis of print advertisements in popular magazines. Begin by examining the ads to choose the content dimensions you wish to use (e.g., gender).
Determination of Nominal, Ordinal, Interval, Ratio.Temperature is an example of what level of measurement.
Unfortunately, any cases not sold by the end of the month are of no value, due to spoilage. How many cases of cheese should Jason manufacture each month?
Her mean waiting time was 7.4 minutes. Assume that the standard deviation has been historically known to be 2.2 minutes. At the .05 significance level, test the claim that the mean waiting time is less than 10 minutes.
Approximately how large should n be
What is the distinction between a one-sided and a two-sided hypothesis test in this problem?
Which of the following statements is true regarding a nonparametric test?
A sample of 100 widgets from the Acme production line shows that the average lifespan of these parts is 900 hours. The standard deviation of production has been 200 hours historically and is known to be normally distributed.
How many citizens would need to be sampled if a 99% confidence interval was desired to estimate the true proportion to within 1%?
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