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An accounting professor at a state university in Vermont recently gave a three-question multiple-choice quiz. Each had four optional answers.
a. What is the probability of getting a perfect score if you were forced to guess at each question?
b. Suppose it takes at least two correct answers out of three to pass the test. What is the probability of passing if you are forces to guess at each question? What does this indicate about studying for such an exam?
c. Suppose through some late-night studying you are able to correctly eliminate two answers on each question. Now answer parts a and b.
There are 20 qualified applicants for 5 trainee positions in a fast-food management program. How many different groups of trainees can be selected?
What does analysis of variance mean? One of the students answers this question as follows:
If possible, determine a 95% confidence interval for average number of television sets in all 50,000 households. If this is not possible, describe why not.
At a 5% level of significance, is there evidence to conclude that the mean life is different from 375 hours?
What is the probability of selecting a value at random and discovering that it has a value of less than 395 pounds?
The manufacture of the X-15 steel belted radial truck tire claims that the mean mileage the tire can be driven before the tread wears out is 60,000 miles.
Find the mean, median, mode, variance, standard deviation, frequency table, cumulative frequency table, coefficient of variation, and mean deviation of the population.
If two of totes don't conform to purity requirements, determine the probability that at least one of nonconforming totes is selected in sample?
A random sample of 77 eighth grade students' scores on a nation mathematics assessment test has a mean score of 278 with a standard deviation of 31.
Pollsters try to determine whether or not a person is a "likely voter" before they count their opinion in a poll. If we assume 40% of the registered voters will actually vote, in a random sample of 100 registered voters we can be 95% confident tha..
What is the 95% confidence interval for the difference between the mean prices of the two models?
Z score on comparison distribution for sample score and your conclusion. Suppose that all population are normally distributed.
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