Question: answer the questions 1. Is a probability distribution defined if the only possible values of a random variable are 0, 1, 2, 3, and P(0)

answer the questions

1. Is a probability distribution defined if the only possible values of a random variable are 0, 1, 2, 3, and P(0) = P(1) = P(2) = P(3) = 1/3? 2. There are 80 questions from an SAT test, and they are all multiple choice with possible answers of a, b, c, d, e. For each question, only one answer is correct. Find the mean and standard deviation for the numbers of correct answers for those who make random guesses for all 80 questions. 3. Are the values found in Exercise 2 statistics or parameters? Why? 4. Using the same SAT questions described in Exercise 2D, is 20 a significantly high number of correct answers for someone making random guesses? 5. Using the same SAT questions described in Exercise 21, is 8 a significantly low number of correct answers for someone making random guesses

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