Average of the means
If a population has a standard deviation of 18, what is the minimum number of samples that need to be averaged in order to be 95% confident that the average of the means is within 2 of the true mean?
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Calculate the p-value and draw conclusions to determine if sales have increased since the new store opened. Use significance level of .01.
A Statistics professor assigned 10 quizzes over the course of the semester. He wanted to see if there was a relationship between the total mark of all 10 quizzes and the final exam mark.
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Let Y1 and Y2 be independent Poisson random variables with means ?1 and ?2, respectively.
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