Question

The given observations are : $8,12,16,10,22,4$ if the observations are decreased by 40%. then mean is 7.2, say true or false.

• A. True
• B. False
• C. Ambiguous
• D. Data insufficient

Answer 1

Answer: (A)

True

The given observations are : $8,12,16,10,22,4$
Decreasing each observation by 40%, we get: $4.8,7.2,9.6,6,13.2,2.4$
Mean = $\frac{Sumofdecreasedobservations}{Numberofobservations}$

Mean = $\frac{4.8+7.2+9.6+6+13.2+2.4}{6}$

= $\frac{43.2}{6}$

= $7.2$