CAPE Applied Mathematics Unit 1 · 2017 · Paper 1 · Question Q37
The time, x minutes, taken for an air conditioning unit to reach its desired temperature, y\ ^\circ\text{C}, when switched on on 9 different occasions is summarized by
\Sigma x = 68.8, \Sigma x^2 = 753.9, \Sigma y = 180, \Sigma y^2 = 5100, \Sigma xy = 1960.
The sample product-moment correlation coefficient, to 3 significant figures, is
- (A)0.153
- (B)0.500
- (C)0.756
- (D)0.999
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