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A study conducted several years ago reported that 21 percent of public accountants changed companies within 4 years. The American Institute of CPAs would like to update the study. They would like to estimate the population proportion of public accountants who changed companies within 4 years with a margin of error of 4% and a 98% level of confidence. (Round your z value to 3 decimals. Round up your answers to the next whole number.)
Assume that Provident Health System ,a for-profit hospital ,has 1 million in taxable income for 2011,and its tax rate is 30 percent.
The average annual return on a certain stock is 8.3%, and the variance of the returns on the stock is 2.3.- Another stock has an average return of 8.4% per year and a variance of 6.4. Which stock is riskier? Why?
Sales and profits. A business analyst was interested in the relationship between a company's sales and its profits.
Suppose that population variances from both conditions are equal is there evidence that treatment decreases surface hardness of steel plates?
A study is done to compare side effects for two different drugs used to treat a medical condition. One hundred people are given each drug.
identify the limitations presented by the study population and the advantages and disadvantages of the statistical analysis used - What is the sample? How did the researchers select their sample?
question to estimate the prevalence of hiv the state of new york implemented a policy of testing women who gave birth.
during the inaugural season of major league soccer in the united states the medical teams documented 256 injuries that
You work at a hospital that has always had about 100 emloyees staffed at night. You think that the number of employees staffed at night has recently decreased and would like to test this claim.
The Complaints Department of a popular used car dealer receives most complaints about the electrical system, particularly the starter.
The annual report of Dennis Industries cited these primary earnings per common share. What is the arithmetic mean primary earnings per share of common stock and The variance?
If the cholesterol levels of adults are normally distributed with mean 230 and standard deviation 25, what is the probability that a randomly sampled adult.
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