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Question: In Problem, change the number of choices for each question to three. Now answer questions (a) through (d).
Problem: A professor gives a test consisting of six multiple choice questions, each offering four answers from which to choose. A student who knows less than nothing takes the test by the method of random choice, simply guessing on each question.
(a) What is the probability that the student gets exactly one question right?
(b) What is the probability of getting exactly two right?
(c) What is the probability of getting four or five right?
(d) What is the probability of getting all six questions right?
An auditor reviewed 25 oral surgery insurance claims from a particular surgical office, determining that the mean out-of-pocket patient billing above the reimbursed amount was $275.66 with a standard deviation of $78.11.
3 cards are randomly selected without replacement from an ordinary deck of 52 playing cards. Compute the conditional probability that the first card selected is a spade, given that the second and third cards are spades.
The number of customers using the service desk has a Poisson distribution. What is the probability that during a randomly selected half-hour period no more than 2 customers use the service desk?
Why did the Monarchy continue to support explorers who did not bring back large amounts of gold and spices?
Thomas Jefferson wrote this secret message to Congress about the Lewis & Clark expedition in 1803
This weekend the team has two games against teams they are not very familiar with. Assuming that the ?rst team they play is a class 1 team with probability 0.6 and the second is, independently of the class of the ?rst team, a class 1 team with ..
Compare the lengths of the confidence intervals based on the mean and 20% trimmed mean. Why is the latter confidence interval shorter?
A population of disk drives manufactured by a certain company runs with mean seek time of 10 milliseconds with standard deviation of 0.1 milliseconds. What proportion of samples of size 250 would you expect to result in a mean less than 9 millisec..
the beer institue conducted a study with looking at beer purcheses per capita across states. some states buy more beer
In a randomized clinical trial of timolol vs. placebo in patients surviving acute myocardial infarction, the total deaths at an average of 24 months after treatment were found to be 65 out of 720 in the Timolol group and 112 out of 860 in the plac..
A speedboat is powered by the jet drive shown. Seawater is drawn into the pump housing at the rate of 20 ft3 /s through a 6-in.-diameter intake A. An impeller accelerates the water flow and forces it out horizontally through a 4-in.- diameter nozz..
Suppose a geyser has a mean time between eruptions of 68 minutes. Let the interval oftime between the eruptions be normally distributed with standard deviation 26minutes. (round everything to four decimal places)
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