I recently competed in a 5K race that had a mean finish time of= 25.3 minutes and standard deviation= 4.8 minutes.The finish times were normally distributed.

5.

a)What is the variable in this example?Classify this variable as qualitative or quantitative, by type (nominal/ordinal/interval/ratio), and as continuous or discrete.

b)Using the empirical rule, find the range of times in which 95% of the runners finished the race.

6.Would either of these finish times be considered unusual?why?

a)17.2 minutes

b)32.3 minutes

7.One of the runners had a finish time one standard deviation below the mean.If there were 189 runners in the race, how many finished before him?