CAIE S1 2017 November — Question 2

Exam BoardCAIE
ModuleS1 (Statistics 1)
Year2017
SessionNovember
TopicMeasures of Location and Spread
TypeFind coded sums from raw data
2 Tien measured the arm lengths, \(x \mathrm {~cm}\), of 20 people in his class. He found that \(\Sigma x = 1218\) and the standard deviation of \(x\) was 4.2. Calculate \(\Sigma ( x - 45 )\) and \(\Sigma ( x - 45 ) ^ { 2 }\).
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