Mathematics 9709 · AS & A Level · Sampling and estimation

Sampling and estimation — practice question

Below are the heights, in metres, for a random sample of 10 mature trees of one variety: $5.9,\; 6.5,\; 6.7,\; 5.9,\; 6.9,\; 6.0,\; 6.4,\; 6.2,\; 5.8,\; 5.8$.
(main)[3]

Find unbiased estimates of the population mean and variance for the heights of all mature trees of this variety.

Worked solution & mark scheme

This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Correct working for the mean $\frac{62.1}{10} = 6.21$” …

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