Justin works for a company that sells clothes online. He finds that 30% of website visitors view his company’s site for less than 30 seconds. His boss doesn’t think that these people are viewing the merchandise, or are likely customers.

a. Why would the median probably be a better measure of central tendency for Justin’s company than the mean of the time people view the company’s website?

b. Even though the people who visit the website for very brief periods of time are not outliers, what would be the advantage of using the trimmed mean?