1.

Find the sum of the observations if the mean is 143 and the number of observations is 8.(a) 1148(b) 1344(c) 1244(d) 1144This question was posed to me during an interview for a job.Question is from Statistics topic in portion Statistics of Mathematics – Class 10

Answer»

The correct choice is (d) 1144

The BEST I can EXPLAIN: ARITHMETIC MEAN = \(\frac {Sum \, of \, the \, observations}{Number \, of \, observations}\)

143 = \(\frac {Sum \, of \, the \, observations}{8}\)

Sum of the observations = 143 × 8

= 1144



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