(a)[2]
Fill in the table for each statement.
(b(i))[4]
Calculate an estimate of the mean time.
(b(ii)(a))[1]
Use the cumulative frequency diagram to estimate the 60th percentile.
(b(ii)(b))[2]
Use the cumulative frequency diagram to estimate how many children spent more than 3 hours exercising.
(b(iii))[2]
Calculate the bar height for the interval $160 < t \leq 220$.