Due to the rapid development of the World Wide Web, there are many web hosting companies who own and manage thousands of individual web sites. One of the concerns for those who have their web sites at a hosting company is the down time of their sites. Twenty customers of a web hosting company were surveyed to determine the amount of down time they experienced (in minutes) during a one-week period. The data is as follows: 0 10 3 30 4 0 0 10 5 40 7 4 0 10 4 9 25 8 5 10 (a) Find the mean and standard deviation of the data set. (b) Find the z-score of the company that had 9 minutes of down time. How far from the mean (in standard deviations) is 9 minutes? Is it above or below the mean? (c) Are there any outliers in this data set