How does the speed of a runner vary over the course of a marathon (a distance of 42.195 km)? Consider determining both the time (in seconds) to run the first 5 km and the time (in seconds) to run between the 35 km and 40 km points, and then subtracting the 5-km time from the 35– 40-km time. A positive value of this difference corresponds to a runner slowing down toward the end of the race. The histogram below is based on times of runners who participated in several different Japanese marathons (“Factors Affecting Runners’ Marathon Per formance,” Chance [Fall 1993]: 24– 30). What are some interesting features of this histogram? What is a typical difference value? Roughly what proportion of the runners ran the late distance more quickly than the early distance?
Answer to relevant QuestionsData on x = poverty rate (%) and y = high school dropout rate (%) for the 50 U.S. states and the District of Columbia were used to construct the following scatterplot (Chronicle of Higher Education, August 31, 2001): Write ...A newspaper headline stated that at a recent budget workshop, nearly three dozen people supported a sales tax increase to help deal with the city’s financial deficit (San Luis Obispo Tribune, January 22, 2005). This ...The article “The Need to Be Plugged In” (Associated Press, December 22, 2005) described the results of a survey of 1006 adults who were asked about various technologies, including personal computers, cell phones, and DVD ...The article “Economy Low, Generosity High” (USA Today, July 28, 2009) noted that despite a weak economy in 2008, more Americans volunteered in their communities than in previous years. Based on census data ...The following two relative frequency distributions were constructed using data that appeared in the report “Undergraduate Students and Credit Cards in 2004” (Nellie Mae, May 2005). One relative frequency distribution is ...
Post your question