Question 20 of 20 (1 point) Attempt 1 of 3 View question in a popup 5.3 Section Exerci Internet Purchases Thirty percent of adult Internet users have purchased products or services online. For a random sample of 200 adult Internet users, find the mean, variance, and standard deviation for the number who have purchased goods or services online. Round your answers to at least one decimal place. Part: 0 / 2 Part 1 of 2 (a) Find the mean. Mean: ul= X 5