(a(i))[1]
Use the cumulative frequency diagram to estimate the median.
(a(ii))[2]
Use the cumulative frequency diagram to estimate the interquartile range.
(a(iii))[2]
Use the cumulative frequency diagram to estimate how many students took more than 40 minutes.
(b(i))[1]
Find the range.
(b(ii))[1]
Find the mode.
(b(iii))[1]
Find the median.
(b(iv))[2]
Work out the total value of Roberto’s coins.
(b(v))[1]
Work out the mean.
(c)[6]
Calculate an estimate of the mean.