Groups of adults are randomly selected and arranged in groups of three. P(x) |a The random variable x is the number in the group who say that they 0366 would feel comfortable in a self-driving vehicle. Determine whether a o_431 probability distribution is given. If a probability distribution is given, nd its 0.180 mean and standard deviation. If a probability distribution is not given, identify the requirements that are not satised. 0'023 iv A. Yes, the table shows a probability distnbutlon. B. No, not every probability is between 0 and 1 inclusive. C. No, the sum of all the probabilities is not equal to 1. D. No, the random variable x's number values are not associated with probabilities. E No, the random variable x is categorical instead of numerical. Find the mean of the random variable x. Select the correct choice below and, if necessary, ll in the answer box to complete your choice. 'v A- p. = 0.9 adult(s) (Round to one decimal place as needed.) B. The table does not show a probability distribution. Find the standard deviation of the random variable x. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. 0 A- o = D adult(s) (Round to one decimal place as needed.) 0 B. The table does not show a probability distribution