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2 A police authority conducts an eight week experiment. In each week it records the number of foot patrols, x, made in a small town

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2 A police authority conducts an eight week experiment. In each week it records the number of foot patrols, x, made in a small town and the number of reported crimes, y, in that town. The data are summarised as follows. x = 52 12 =380 xy = 1335 Ey = 225 12 = 7007 1 = 8 (a) Calculate the value of the product moment correlation coefficient for these data

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