(2) Statistics and Probability

2. Suppose Mary has yoga classes 3 days in a week. She attends classes 3 days a week 80% of the time, 2 days 15% of the time, 1 day 4% of the time and is absent for the week 1% of the time. Let X be the number of days Mary is present in a week. a. Construct the probability distribution of X in a tabular form. b. What is the probability the Mary will be absent for at most 2 days? :2. Compute the mean and standard deviation of X