Mathematics (AS & A Level) · Oct / Nov 2017 · Paper 72 · Question 3
9709
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The masses, m kg, of packets of flour are normally distributed. The mean mass is supposed to be 1.01 kg. A quality control officer measures the masses of a random sample of 100 packets. The results are summarised below. n = 100 Σm = 98.2 Σ m2 = 104.52
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3(i)[7]
3(ii)[1]
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