Values for the random variables or uncertain variable inputs to a simulation are a. controlled by the decision maker. b. selected by the decision maker. c. calculated by fixed mathematical formulas. d. randomly generated from the specified probability distributions. Regret is the difference between the payoff associated with a particular decision alternative and the payoff associated with the decision that would yield the most desirable payoff for a given state of nature. True False States of nature a. cannot be enumerated by the decision maker. b. are the possible outcomes for a chance event. c. can be selected by the decision maker. d. None of these choices are correct. The mean squared error is obtained by computing the average of the squared forecast errors. True False In order to use moving averages to forecast a time series, the first step is to select the order k, the number of time series values to be included in the moving average. True False