1.

Find the sum of the observations if the mean is 23 and the number of the observations is 11?(a) 283(b) 256(c) 293(d) 253The question was posed to me in an interview for job.The query is from Statistics in division Statistics of Mathematics – Class 10

Answer»

Correct option is (d) 253

For EXPLANATION I would SAY: ARITHMETIC mean = \(\FRAC {Sum \, of \, the \, observations}{Number \, of \, observations}\)

23 = \(\frac {Sum \, of \, the \, observations}{11}\)

Sum of the observations = 23 × 11

= 253



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