Mathematics 9709 · AS & A Level · Sampling and estimation
Sampling and estimation — practice question
This cumulative frequency table gives the examination marks for $300$ candidates in country $A$ and $300$ candidates in country $B$.
(i)[2]
Without plotting a graph, show that the median for country $B$ is greater than the median for country $A$.
(ii)[1]
Find how many candidates in country $A$ scored from $20$ to $34$ marks inclusive.
(iii)[4]
Calculate an estimated mean mark for candidates in country $A$.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Correct numerical value stated for $\text{median}_A$ or $\text{median}_B$” …