Assume that you assign the following subjective probabilities for your final grade in your econometrics course (the standard GPA scale of 4-A to 0-F applies): Grade A The expected value is: OA. 2.78. OB. 3.5. OC. 3.0. OD. 3.25. (BUDE с F Probability 0.20 0.50 0.20 0.08 0.02
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- You are looking at taking two professors for a course. The first professor has an average grade of 85% with a standard deviation of 2%. The second professor has an average grade of 50% with a standard deviation of 15%. What is the probability you pass the second professor's class? 0.91 0.09Dan Conway invested his life savings in cryptocurrencies in 2016. Since then, that investment has earned an average return of 10.51%. What is the range of Dan Conway’s returns with a 68% probability, if his investment exhibits a standard deviation of 19.32%? a. −28.13% to 49.15% b. −18.47% to 39.49% c. −8.81% to 12.21% d. −8.81% to 29.83% e. −47.45% to 68.47%4qs
- Español The producer of a weight-loss pill advertises that people who use the pill lose, after one week, an average (mean) of 1.85 pounds with a standard deviation of 0.95 pounds. In a recent study, a group of 55 people who used this pill were interviewed. The study revealed that these people lost a mean of 1.9 pounds after one week. If the producer's claim is correct, what is the probability that the mean weight loss after one week on this pill for a random sample of 55 individuals will be 1.9 pounds or more? Carry your intermediate computations to at least four decimal places. Round your answer to at least three decimal places. X S ?Ryan is throwing a football through a tire in his backyard. He has the probability of .30 of throwing the ball through the tire on each attempt, and each attempt is independent of the one before. Draw the graph of the PDF for the first five attempts. What does the graph tell you about the mean and standard deviation?A department store manager has monitored the number of complaints received per week about poor service. The probabilities for numbers of complaints in a week, established by this review, are shown in the table. Number of complaints Probability 0 0.16 1 0.26 2 0.35 week? 3 0.10 4 0.08 5 0.05 What is the standard deviation of complaints received per Please round your answer to the nearest hundredth. Note that the correct answer will be evaluated based on the full-precision result you would obtain using Excel.
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