Mathematics 9709 · AS & A Level · Sampling and estimation

Sampling and estimation — practice question

100 adults chosen at random each throw a ball once. The distance, $l$ metres, for each throw is measured. The findings are summarised below: $n = 100$, $\Sigma l = 3820$, $\Sigma l^2 = 182\,200$.
(main)[6]

Calculate a 94% confidence interval for the population mean length of throws by adults.

Worked solution & mark scheme

This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The sample mean is $\bar x = \frac{3820}{100}=38.2$.” …

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