Employers typically provide Internet access to assist employees in work-related activities. An IT department officer is monitoring the Internet data usage in a company. She collects the daily amount of data usage

(in GB) for a period of 20 days:

45 48 47 46 39 41 35 33 48 44 38 42 44 50 44 40 36 45 49 45

a. Calculate the range, interquartile range, and standard deviation for these data.

b. Which of the finding in part a best represents the variation of daily amount of data usage for the company? Explain.

c. What does the standard deviation indicate about the company’s daily amount of data usage?