Answer Happy

Please solve:
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 to run the first 5 km and the time to run between the 35-km and 40-km points, and then subtracting the former time from the latter time. A positive value of this difference corresponds to a runner slowing down toward the end of the race. The accompanying histogram is based on times of runners who participated in several different Japanese marathons. Frequency 200 150 - 100 50 - Time difference -100 0 100 200 300 400 500 600 700 800 What are some interesting features of this histogram? (Select all that apply.) small sample size positively skewed O negatively skewed mostly positive values normally distributed small spread What is a typical difference value? (Enter an approximate value.) sec Roughly what proportion of the runners ran the late distance more quickly than the early distance? (Round your answer to two decimal places.)