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You are the shipping manager at a company. You are interested in the percentage of packages delivered damaged. A simple random sample of 500 packages yields 12 delivered damaged and 488 delivered undamaged. Compute the 99% confidence interval for the percentage of packages that are delivered damaged in the population.
This requires you evaluate the data (on the next sheet) and apply Queueing Theory to determine the characteristics of the queues. Please refer to the concept on Queuing Theory for the procedures to do.
A deck of cards contains 52 cards, 13 in each of four suits (hearts, diamonds, clubs and spades). Suppose you have been dealt five cards without replacement from a randomly shuffled deck of cards. Find the probability that al five cards are hearts..
The Type 1 error states the probability of being wrong whenever:
Create a scenario where the binomial probability formula could be used to determine the probability of some number of successes, x, in some given number of trials,n.
Data in table represent number of consumer complaints against major U.S. airlines. If one complaint from table is arbitrarily chosen, determine the probability that it was filed against United Airlines.
Determine the probability mass function of the salesperson's November sales (in $). What is the probabiity that his sales for November will be less than 100k? Find the mean and standard deviation of the November sales.
While dealing with 16 students, suppose that the alternative hypothesis has been one-sided and that it was set as Ha :
Estimate the 95% confidence interval for the proportion of the electorate that support this policy.
The Duracells had an average lifetime of 18.67 hours (SD = 1.176 hours) while the Energizer batteries had an average lifetime of 16.83 hours (SD = 2.878 hours). Assuming the population standard deviations to be equal, what is the test statisitic a..
In the last quarter of 2007 a group of 64 mutual funds had a mean return of 0.9% with a standard deviation of 5.2%. Consider the normal model N(0.009.052) for the returns of these mutual funds.
A researcher has been hired by a pizzeria to determine which type of crust customers prefer. The restaurant offers three types of crust: hand tossed, thick, and thin.
Sketch a histogram of these data and give the modal class.
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