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We'd like to determine the percentage of people who own cell phones. We sample 64 people and we find that 52 of them own cell phones. Find a 90% confidence interval for the true proportion of people who own cell phones.
Create a mixed integer programming model for this problem.
What is the 95% confidence interval for the difference between the mean prices of the two models?
Tanker trucks are designed to carry huge quantities of gasoline from refineries to filling stations. A factory that manufactures the tank of the trucks claims to manufacture tanks with a capacity of 8550 gallons of gasoline. The actual capacity of..
Two fair dice are tossed. Find the probability that: Both dice are even numbers
adult consumers at three fast-food hamburger chains at lunchtime in new york city were approached as they entered the
If the shop does not want to give more than 1% of its customers a free lube and oil change service, how long should the guarantee be?
The personnel director of Cander Machine Products is investigating perfectionism on the job. A test designed to measure perfectionism was administered to a random sample of 18 employees.
Verify that trimci returns a 0.95 confidence interval for the 20% trimmed mean, using R, equal to (7.16, 22.84). Now use trimci to get a confidence interval for the mean, resulting in (8.50, 33.99). Why is the confidence interval substantially lon..
Pat wants to compare the cost of one- and twobedroom apartments in the area of her college campus. She collects data for a random sample of 10 advertisements.
Winning has a payoff of 1 while losing has a value of -1. No gain results in a turnover. What is the value of having the ball?
your local newspaper contains a large number of advertisements for unfurnished one-bedroom apartments. you choose 10 at
Let Z be the random variable giving the number of times the second biased coin (coin #2) comes up heads. What is the probability mass function of Z? What is the mean and variance of Z?
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