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The MacBurger restaurant chain claims that the waiting time of customers for service is normally distributed, with a mean of 3 minutes and a standard deviation of 1 minute. The quality-assurance department found in a sample of 50 customers at the Warren Road MacBurger that the mean waiting time was 2.75 minutes. At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes?
The number of customers at a specialty meat store averages about 1500/day. The exact number varies from day to day. On Fridays before long weekends, the number of customers increases to about 3000. Which of the following statements is correct
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A process is out of control when:
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What is the probability of selecting an accounting major, given that the person selected is a male?
The width of a confidence interval will be:
What is the probability that all tree students pick a different card?
What is the standard deviation of expected returns for Stock X? For Stock Y?
Calculate and interpret standard error of estimate se and coefficient of determination R2 for these data.
Solve the mean and standard deviation equations
A permutation resample for a two-sample test
Determine the probability in big class that both sections are covered? Only one section? Neither section? Determine the expected number of sections covered?
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