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Use the sign test for the claim involving nominal data
Cheating Gas Pumps When testing gas pumps in Michigan for accuracy, fuel-quality enforcement specialists tested pumps and found that 1299 were not accurate (within 3.3 oz when 5 gal is pumped), and 5686 were accurate. Use a 0.01 significance level to test the claim of an industry representative that less than half of Michigan gas pumps are inaccurate.
Assume a business researcherwishes to test hypothesis that greater proportion of marketing managers keep track of such obligations.
Use the population standard deviation along with the sample mean, S, and find a 92% confidence interval for the population mean. Is the true population mean contained in this interval?
ACT scores of high school seniors. The scores of high school seniors on the ACT college entrance examination in 2003 had mean JL = 20.80 and standard deviation (J = 4.80. The distribution of scores is only roughly Normal.
Test the given claim using the traditional method of hypothesis testing.
Perform a significance test to see if there is a relation between mortality and duration of employment in the group hired AFTER 1945 and report a p-value.
One group is given the new drug and the other group is given the standard drug. Data are recorded on the effects of each drug. Is the research division using dependent or independent samples? Why?
23% of college students say that they use credit cards because of the rewards program. you randomly select 10 students who say that they use the credit card because of its rewards program.
The MacBurger restaurant chain claims that the waiting time of customers for service is normally distributed,
What does the binomial distribution chart look like? Can I use Excel to come up with this chart?
According to a report by Scarborough Research, the average monthly household cellular phone bill is $73. Suppose local monthly household cell phone bills are normally distributed with a standard deviation of $11.35.
An experiment involves rolling a fair six-sided die repeatedly. How many times must the die be rolled for a {6} to result at least once with probability greater than or equal to 0.6 ?
Explain how much should the airport authority be willing to pay for perfect information about the success of a brand new airport.
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