Mathematics 9709 · AS & A Level · Sampling and estimation
Sampling and estimation — practice question
In a showroom, the prices in dollars of 11 caravans are: 16800, 18500, 17700, 14300, 15500, 15300, 16100, 16800, 17300, 15400, 16400.
(a)[3]
Show these prices using a stem-and-leaf diagram.
(b)[1]
State the lower quartile for the prices of the caravans in the showroom.
(c)[3]
3 different caravans in the showroom are chosen at random and their prices are recorded. Find the probability that 2 of these prices are more than the median and 1 is less than the lower quartile.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The stem on the stem-and-leaf diagram is correct” …