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Dunkin Donuts claim s that the waiting time of customers for service is normally distributed with a mean of three minutes and a standard deviation of one minute.. The quality assurance department found in a sample of 50 customers that the mean waiting time is 2.85 minutes.. At a 0.05 level of significance,, can we conclude that the mean waiting time is less than three minutes?
The mean return for a random sample of 33 mutual funds is 14.93 percent with a standard deviation of 9.57. Build a 95 percent confidence interval for mu, population mean.
So decide to exercise by playing at least one game every day. To avoid but very tired , decides not to play more than 12 games a week. Prove that there are a number of consecutive days that will just play 21 games.
Why is it necessary for companies to use Integrated Marketing Communications to reach their desired audience? What are some examples to help me further
What statistical procedure would you use to construct a 90% confidence interval for the mean difference in systolic blood pressure
Solve the following problems by using the binomial formula.
Examine the data from the 30 MLB teams during the 2009 season. We will search for linear relationships between potential explanatory variables.
The U.S. Commission of Crime wishes to estimate the fraction of crimes related to firearms in an area with one of the highest crime rates in the country.
The manager of a local gym has determined that the length of time patrons spend at the gym is a normally distributed variable with a mean of 80 minutes.
give three examples where descriptive statistics are misleading. what should be done about this
The events X and Y are mutually exclusive. Suppose P(X) = .05 and P(Y) = .02. (Show work)
1. you work at a bank and are asked to recommend the amount of cash to put in an atm each day. you dont want to put in
Who would you seek approval at the time a risk materializes.
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