Refer to the accompanying table, which describes the number of adults in groups of five who reported sleepwalking. Find the mean and standard deviation for the numbers of sleepwalkers i groups of five. Click the icon to view the data table. The mean is sleepwalker(s). (Round to one decimal place as needed.) The standard deviation is sleepwalker(s). (Round to one decimal place as needed.) Table of numbers of sleepwalkers and probabilities XO1234 P(x) 0 0.169 0.357 0.304 0.135 0.031