(a(i))[1]
Find the median time value.
(a(ii))[1]
Find the value of the interquartile range.
(a(iii))[5]
Find the difference between the average speed of the quickest car and the average speed of the slowest car. Give your answer in kilometres per hour.
(b(i))[1]
Write down the class interval that includes the median.
(b(ii))[4]
Calculate a mean estimate.
(b(iii))[3]
Calculate the height of each bar for the intervals $300<d\le400$, $400<d\le420$, $420<d\le450$.
(b(iv))[3]
Find the probability that one car can cover more than 450 km and the other car can cover not more than 300 km.