Mathematics (AS & A Level) · May / June 2019 · Paper 72 · Question 3
9709
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It is claimed that, on average, a particular train journey takes less than 1.9 hours. The times, t hours, taken for this journey on a random sample of 50 days were recorded. The results are summarised below. n = 50 Σt = 92.5 Σt2 = 175.25
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3(i)[3]
3(ii)[5]
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