Question 13 [2 points} If the odds of an event happening are 12 to 2, what is the probability that the event happens, to two places of decimal. Your Answer: Answer Question 14 [2 points} A discrete random variable, X, takes on the values 9, 145, 525, and 2,100, with probabilities 0.?0, 0.15, 0.10, 0.05, respectively. Use the statistical capacity of your calculator to find the standard deviation of the random variable, X, rounded to two decimal places. Note that this is a probability distribution. Your Answer: | :] Answer Question 15 [2 points) A research group consists of 4 professors and 16 students. A committee is to be formed consisting of 2 professors and 5 students. In how many different ways can the committee be selected? Enter your answer with no commas. Your Answer: :] Answer Question 16 [2 points) The random variable Xis binomially distributed with n = 21 and p = 0.25, find PIX: 5). State your answer rounded to 3 places of decimal. Your Answer: |