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Imagine you are the CEO of a local bank whose credit card holders engage in 1 billion credit card transactions per year; that the likelihood of a fraudulent transaction is 2%; that the average transaction purchase value for all transactions is equal to $38.50; and that the bank bears the full cost of all fraudulent transactions (i.e., you hold the cardholder harmless and lose the money yourself). A technology vendor proposes a software solution that will allow you to identify and decline 50% of all fraudulent transaction, thus reducing your fraudulent transaction rate to 1%. What is the maximum amount of money that you would be willing to pay for this investment? Why (please justify using mathematical/statistical tools)? What other information would be important to you in deciding whether the software is worth the investment?
Re item 4, assume the critical value for this test is 4.92, and you obtain a computed statistical value of 7.45. Is there evidence to refuse null hypothesis? Describe why or why not?
A method of determining if relationships exist between two variables is:
Below are revenue and profit (both in $ billions) for nine large entertainment companies.
what is the chance the average contents of the cans will be less than advertised and what will be the standard deviation of the number of men who help at home, based on the first survey
Give a brief definition and an example of the following: a. Descriptive Statistics b. Inferential Statistics
Compute an exponential smoothing forecast with a =.20, an adjusted exponential smoothing forecast with a = .20 and B =.20 and a linear forecast. Compare the three forecast, using MAD and average error (E) and indicate which seem to be most accurat..
How would managers find benefit in helping them to obtain valuable information in problem identification research. Discuss whether these data are secondary or primary and justify your answers
A class has 13 women and 18 men. If student if selected randomly, determine the probability student is a woman?
Identify at your place of work (or a previous place of work, or an organization with which you are affiliated). Identify a dependent variable and 3 independent variables
Mean threshold values and standard deviations for the three groups are given below. Normal probability plots showed the three populations were well approximated by the Normal distribution.
Give the Z score for person who scores (a) 340, (b) 310, and (c) 260. Give the raw scores for persons whose Z score on this test are (d) 2.4, (e) 1.5, (f) o, and (g) -4.5
Estimate and interpret the p-value of the calculated test statistic.
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