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Compute some probabilities for Facebook friends. Suppose that 60% of your Facebook friends became your friends because you asked them to be. You select a simple random sample of 20 of your friends.
(a) What is the probability that 12 of them became your friend because you asked them?
(b) What is the probability that between 9 and 15 of them became your friends because you asked them? Include the possibilities of 9 and 15 in your calculations.
(c) What are the mean and the standard deviation of the number who became your friends because you asked them?
a major department store chain is interested in estimating the average amount its credit card customers spent on their
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find the mean variance and standard deviation of the binomial distribution with the given values of n and p.n90
Let F(x,y) be the statement x can fool y, where the domain of discourse for both x and y is all people. (a) Use quanti?ers to express each of the following propositions in symbols.
What inferential statistical tests are appropriate to answer your research question as to whether past participation and contribution will make a difference in people enjoying, and supporting an event?
estimating the sample standard deviation using normal score.for a sample with a mean of m 85 a score of x 90
If the gender-selection method has no effect and boys and girls are equally likely, find the mean number of boys born in groups of 152. Round to the nearest whole number.
the piron software company currently develops marketing software for primarily service-based organizations. they
What could Bristol Myers have done to improve the validity of the results after they had mailed the 10,000 surveys and received 1,983 back? Assume they kept record of who had responded and who had not.
Reading highway signs is not always easy, especially if your vision is imperfect. Vision in general tends to deteriorate with age. Two researchers conducted a study to determine if the distance at which a standard highway sign could be recognized ..
A customer with a trade-in offers the store a $260 cash price for the cabinet. Is that a better deal (for the customer) than the store is offering? On Mary's 16th birthday, her parents invest on her behalf an amount of $5,000 into an account that ..
Determine critical path and project completion time. Determine the probability that the project will be finished in 70 days or less. Determine the probability that the project will be finished in 80 days or less
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