Question: Let A denote the event that the next request for assistance from a statistical software consultant relates to the SPSS package, and let B be

Let A denote the event that the next request for assistance from a statistical software consultant relates to the SPSS package, and let B be the event that the next request is for help with SAS. Suppose that P(A) = 0.20 and P(B) = 0.50. (There are various packages such as Minitab, SPSS, SAS, JMP, and R.) (a) Why is it not the case that P(A) + P(B) = 1? The probabilities do not add to 1 because there are other software packages for which requests could be made. The probabilities should add to 1; P(A) or P(B) must be recorded incorrectly. The probabilities are not mutually exclusive and thus they do not need to add to 1. The probabilities do not add to 1 because they are independent events. The probabilities do add to 1. (b) Calculate P(A'). 0.8 (c) Calculate P(A U B). 0.7 (d) Calculate P(A'n B'). 1X Need Help? Read It

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