Sampled students live on campus
At a large university it is known that 40% of the students live on campus. The director of student life is going to take a random sample of 200 students. What is the probability that more than half of the sampled students live on campus?
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John Beale of Stanford, CA, recorded the speed of cars driving past his house where the speed limit read 20 mph. The mean of 1000 readings was 23.84 mph, with a standard deviation of 3.56 mph. How many Standard Deviations from the mean would a car
There are two multiple choice questions on a quiz and a student answers the two questions at random. Each question has four possible choices with only one correct answer. What is the conditional probability that he picked the correct answer on bot
A company employs 50 people in the sewing department. 40 of them belongs to a union and 10 do not. 5 are selected at random to form a committee to meet with management regarding shift times. What is the probability that at least 3 of the 5 selecte
You work for a large international oil company searching for oil off the coast of Australia, not too far from Melbourne. Your firm has acquired drilling rights, and you are contemplating your firm's options.
A random sample of 900 refrigerators contains 79 defective units. Estimate the process fraction nonconforming. What is the distribution of nonconforming units? Can this be approximated? With what?
You have made 72 payments and wish to know how much you owe on the mortgage, which you are considering paying off with the lottery money you just won. How much money do you need to have won to pay of the mortgage?
A game is said to be fair if the expected value for winnings is 0, that is, in the long run, the player can expect to win nothing. Consider the following game. The game costs $1 to play and the winnings are $5 for red, $3 for blue, $2 for yellow a
Their scores on the test are 15, 14, 20, 20, 25, 22, 21, 19, 16, 17, 21, 22. What statistical test should be used to analyze the data?
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