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If you want to be 95% confident of estimating the population proportion to within a sampling error of (plus or minus 0.05 ) and there is historical evidence that the population proportion is approximately 0.37, what sample size is needed?
XYZ car rental company determined that the distance traveled per car per year is normally distributed with a standard deviation of 645 miles. If 12% of the cars travel more than 55,000 miles, what is the mean distance traveled per year?
If there are 500 students in the school, what is the probability that everyone will pass the exam?
Under what conditions should you use the McNemar test? Under what conditions should you use the Kruskal-Wallis rank test?
Do you try to pad your insurance claim to cover your deductible? About 40% of all U.S. adults will try to pad their insurance claims. Suppose that you are the director of an insurance adjustment office.
question 1a food research laboratory conducts a series of taste tests to compare two sauce recipes a and b. customers
Obtain a test statistic and p -value assuming equal variances. Interpret these results.
Shown below are rental and leasing revenue ?gures for of?ce machinery and equipment in the United States over a seven-year period according to the U.S. Census Bureau. Use these data to run a linear regression and then forecast the rental and leasi..
If the researchers test 95- newborns for the presence of this gene, would it be unlikely for them to find fewer than 25 children with the gene?
Suppose that your company manufactures computer equipment and you must determine if a supplier of your company meets the required product specifications.
Suppose a student received the following grades for the semester: History, B; Statistics, A; Spanish, C; and English, C. History and English are 5 credit hour courses
In order to do so, they review 42 service calls and construct a 95% confidence interval for population mean: (2.468, 2.743). What can we conclude about the significance test of Ho: mu = 2.6 vs Ha: mu does not equal 2.6?
If they enroll this many pupils, how much would they need to charge per pupils in order to realize their profit goal of $5,000.
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