21. Quantcast.com provides the number of people from the United States who visit a given website. The list below shows the number of U.S, visitors for the 50 most highly visited websites (Quantcast.com website, December 2015). 195pend Chapter 3 Descriptive Statistics: Numerical Measures Compute the median salary for the sample of 15 middle-level managers. How does the median for this group compare to the median reported by The Wall Street Journal? D. Compute the mean annual salary and discuss how.