can you help me understand how to answer. this

(e) The number of cars, 72;, i = 1,. ..,6, passing a point on a road in a 10-minute interval, is recorded at the same time of day and week, over 6 successive weeks, as follows: Ire-[1816 221318 21| Use these data to compute a parametric estimate of the probability that the number of cars next week, in 1 minute, will be no more than one (car) away from its mean. ' [20 %]