Groups of adults are randomly selected and arranged in groups of three. X P(x) The random variable x is the number in the group who say that they 0 0.359 would feel comfortable in a self-driving vehicle. Determine whether a 0.429 probability distribution is given. If a probability distribution is given, find its mean and standard deviation. If a probability distribution is not given, 2 0.189 identify the requirements that are not satisfied. 3 0.023 Find the mean of the random variable x. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. = adult(s) (Round to one decimal place as needed.) Help me solve this View an example Get more help Clear all Previous