Mathematics 9709 · AS & A Level · Sampling and estimation
Sampling and estimation — practice question
The counts of people using a particular bus at different points in the day are: $17, 5, 2, 23, 16, 31, 8, 22, 14, 25, 35, 17, 27, 12, 6, 23, 19, 21, 23, 8, 26$.
(i)[3]
Draw a stem-and-leaf diagram that shows the information given above.
(ii)[3]
Find the median, the lower quartile, the upper quartile and the interquartile range.
(iii)[1]
State, in this case, which of the median and mode is preferable as a measure of central tendency, and why.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Accurate stem values used in the stem-and-leaf diagram” …