Confidence interval for the mean salary
Suppose you have a list of salaries of all Major League Baseball players in 2013. Does it make sense to find a 95% confidence interval for the mean salary? If so, what is the relevant population?
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However, you understand that pitfalls may exist in the data collection process and the reasoning process. For instance, you know to watch for:
In the following problem, check that it is appropriate to use the normal approximation to the binomial. Then use the normal distribution to estimate the requested probabilities.
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A politician claims that she will receive 63% of the vote in an upcoming election. The results of a properly designed random sample of 100 voters showed that 55 of those sampled will vote for her.
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