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A study of 420039 cell phone users found that 131 of them developed cancer of the brain or nervous system. Prior to this study of cell phone use, the rate of such cancer was found to be 0.0225% for those not using cell phones. A: use the sample data to construct a 95% confidence interval estimate of the percentage of the cell phone users who develop cancer of the brain or nervous system
What type of statistical test best assesses the relationship between job satisfaction and level of stress and what test would be appropriate to determine whether the difference between men and women is real or due to chance variation?
suppose you want to estimate the population proportion of statistics nerds at college. to do so you take a sample of
What formula would I use? Can you break it down into baby steps so I can understand how you got the answer?
what is the first big change that american drivers made due to higher gas prices? according to a survey 30 said that it
Mean of 3 goals per game. Find the probability that each of four randomly selected state college hockey games resulted in 6 goals being scored.
It is suspected that the mean turnover has changed and is not 6.0. Use the .05 significance level. State the decision rule.
Location along 500-ft assembly line from which to observe the work habits of the workers on the line. What is the probability that the point she selects is?
There are many nonparametric tests that have been developed over the years. Explain what nonparametric tests are and why they were developed.
How large a sample size, n, should they recruit in order to obtain a confidence interval with margin of error ± 3% based on this prior guess?
Sketch a graph and shade the area of interest. SCores on a standardized exam are normally distributed with u = 60 and o = 5.
Assume that waiting times are approximately normally distributed. Construct a 98% confidence interval for the population mean of waiting times.
In brief describe three situations in which the 'First In First Out' discipline rule is not applicable in queuing analysis. Provide examples of four situations in which there are limited, or finite population.
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