Mathematics (AS & A Level) · May / June 2019 · Paper 73 · Question 2
9709
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The length of worms is denoted by X cm. The lengths of a random sample of 50 worms were measured. Some of the results were lost, but the following results are available. ³ Σx2 = 4361 ³ An unbiased estimate of the population variance of X is 9.62. Calculate the mean length of the 50 worms. [3]
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