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A multiple choice test has three questions with 5 possible answers (and oly one right answer each). You decide to randomly guess the right answer.
A. What is the probability of getting the first question right?
B. what is the probability of getting the first two questions right?
C. What is the probability of getting all three questions right?
D. what is the probability of getting none of the questions right?
E. What is the probability of getting at least one of the questions right?
Compare a three-month moving average forecast with an exponential smoothing fore-cast for a = 0.2. Which provides the better forecasts using MSE as the measure of model accuracy?
Is the z value positive or negative? Explain why it should be positive or negative.
USA Today reported that 11% of all books sold are of the romance genre. If a local bookstore sells 316 books on a given day, what is the probability that
The final grades given by two professors in introduction to operations research course have been carefully examined. The students in the first professor's class had a grade point average of 3.0 and a standard deviation of 0.2.
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
If the sum of squares total is 800 and the sum of squares error is 170. What is the r-squared value?
For each problem, compute a Welch F-statistic and determine whether or not significant differences exist among the treatment conditions.
Determine a 95% confidence interval for true time battery pack can function before having to be recharged.
Test the hypothesis that the true Pearson correlation (p) is significantly different from zero. Provide a (p) value (two-tail) n=12. Correlation intake is .448 for the two recording methods.
If 900 users visited the site, would the probability that more than 250 of them click on an ad be higher or lower than the answer found in part
Decision making under risk is the same as decision making under uncertainty because in both the probabilities are unknown.
lowering the price does not decrease this behavior and we should not decide to lower prices based on this research." Comment on the executive's conclusion. What type of inference is being made? Will the decision not to lower prices be a good one.
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