Question

if the mean of 25 observations are each observation is decreased by 7 find the new mean.​

Answer 1

Step-by-step explanation:

Mean of given observations = sum of given observations/ total number of observations

Mean of 25 observations = 27

∴ Sum of 25 observations = 27 × 25 = 675

If 7 is subtracted from every number, then the sum = 675 – (25 × 7) = 675 – 175 = 500

Then, new mean = 500/25 = 20 Thus, the new mean will be 20.

Answer 2

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