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Imagine that a student takes a 20-item multiple choice exam. She didn't study, so all of her answers are guesses. Each item on the exam has five possible answers. What is the expected number of correct answers?
In a column, write the sample space for the experiment that consists of observing the day's production.
Find the area under the normal distribution curve between z = 1.52 and z = 2.43.
A consumer purchases 12 frozen chickens. What is the probability that the consumer will have more than 6 contaminated chickens.
How many jackets should the store owner order if she wants to maximize her expected profit?
State which of the three diet colas (marked as A, B or C) he or she prefers. Draw a tree diagram depicting the sample space outcomes for the test results.
Is there evidence to suggest that the training course helps out sales people?
Set up hypotheses to test if distribution of birthdays can be considered coming from uniform distribution.
Managers from accounting department and information technology department. What is the probability that the committee will contain at least two managers from accounts departments.
If we wanted to shorten the interval of the estimation of the true mean of Saturday sales to a width of $600 in total, what should the size of our sample be to achieve it?
a coin is tossed three times. find the probability that the coin lands on tails then heads then
test for single mean.according to one investigators model the data are like 400 draws made at random from a large box.
Ppurpose of determining the roommates. If the pairing is done at random, what is the probability that there are no offensive-defensive roommate pairs?
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