The Highway Patrol, using radar, checked the speeds (in mph) of 30 passing motorists at a
checkpoint. The results are listed below.
33 48 43 43 41 45 36 40 37 41
35 50 49 39 47 42 45 50 36 41
36 48 43 50 42 40 35 38 38 44
The mean is 42mph and the standard deviation is 5mph.
What is the percentile for 39 mph? (hint: put the values in order and then determine the
percentile...round to a whole %)