Mathematics (AS & A Level) · May / June 2021 · Paper 61 · Question 4
9709
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100 randomly chosen adults each throw a ball once. The length, l metres, of each throw is recorded. The results are summarised below. n = 100 Σl = 3820 Σl2 = 182 200 Calculate a 94% confidence interval for the population mean length of throws by adults. [6]
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