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It has been reported that 80% of taxpayers who are audited by the Internal Revenue Service end up paying more money in taxes. Assume that auditors are randomly assigned to cases, and that one of the ways the IRS oversees its auditors is to monitor the percentage of cases that result in the taxpayer paying more taxes.
If a sample of 400 cases handled by an individual auditor has 77.0% of those she audited paying more taxes, is there reason to believe her overall "pay more" percentage might be some value other than 80%? Use the 0.10 level of significance in reaching a conclusion. Determine and interpret the p-value for the test.
Citrus Rental is a popular car rental agency that has a history of having too few cars available, so that its available cars are overdriven. The mean monthly mileage over the years for Citrus cars has been about 1550 miles per month.
Suppose that a certain college class contains 42 students. Of these, 23 are freshmen, 28 are history majors, and 8 are neither. A student is selected at random from the class. (a) What is the probability that the student is both a freshman and a hi..
describing distribution the reaction times of 500 randomly selected drivers measured under standard conditions.a. how
Explain the distribution of mean of samples of size 15.
(a) What is the physical meaning of "fast enough" in quantum mechanics?
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.
events a and b are mutually exclusive. suppose event a occurs with probability 0.29 and event b occurs with probability
When would you use hypothesis testing and when would you use confidence intervals?
significance level α = 0.01 and a degree of freedom = 11. In this situation, the null hypothesis that the observed distribution is the same as the expected distribution is?
Assume that a hand of 12 cards is dealt from a normal deck of 52 playing cards. What is the probability that of the 12 cards, 3 will be diamonds, 3 will be clubs, 3 will be spades, and 3 will be hearts.
A problem to solve. What sample size must be taken to estimate the average gas price in houston with 99% confidence and max error of 5 cents?
a bank manager wishes to provide prompt service for customers at the banks drive-up window. the bank currently can
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