1. According to a utility company, utility plant expenditures per employee were approximately $50,845, $43,690, $47,098, $56,121, and $49,369 for the years 2005 through 2009. Employees at the end of each year numbered 4738, 4637, 4540, 4397, and 4026, respec- tively. Using the annual number of employees as weights, what is the weighted mean for annual utility plant invest- ment per employee during this period?
2. A student scored 90 on the midterm exam, 78 on the final exam, and 83 on the term project. If these three components are weighted at 35%, 45%, and 20%, respectively, what is the weighted mean for her course performance?
3. An observer stands at an overpass and, for each motorcycle that passes below, records the value of x5 the number of riders on the motorcycle.
a. What value would you anticipate for the mode of her data? Why?
b. Would you anticipate that the mean would be greater than or less than the mode? Why?
c. Would you anticipate that the mean would be greater than or less than the median? Why?