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An accounting firm is planning for the next tax preparation season. From last year's returns, the firm collects a systematic random sample of 100 filings. The 100 filings showed an average preparation time of 90 minutes with a standard deviation of 140 minutes.
1. The intelligence Quotient test scores normally distributed with a mean of 100 and a standard deviation of 15. What is the probability that a person would score 130 or more on the test?
2. What is the probability that a person would score between 85 and 115?
The probability of obtaining a random sample mean, which is lower than the population mean, is:
Z score on comparison distribution for sample score and your conclusion. Suppose that all population are normally distributed.
Based on this survey, what conclusions can you reach about the use of the Internet at work.
Another day, it took Eric only 12 minutes to get to work. Using the same formula, determine the z value. Is it positive or negative? Explain why it should be positive or negative.
Determine the probability that the project will be completed in 80 days or less.
We are asked to test for independence between age (i.e., adult and teen) and drink preferences.
Could mud-wrestling be the cause of a rash contracted by University of Washington students in the spring of 1992? Two physicians at the University of Washington health center wondered this when one male and six female students complained of rashes..
Compute mean x and standard deviation s of data above. Calculate Ho by using traditional/classical method.
Which of the given is the example of a discrete random variable? Which of the given is an example of continuous random variable?
What is the appropriate set of hypotheses to test such that a possible outcome of the test would indicate;
Would the method described above be a good way to determine which team was taller (explain why or why not)?
Where should the warranty limits be set so that only 10 percent of the HDTVs need repairs at the manufacturer's expense?
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