6. The mean of 10 observations is 10. All the observations are increased by 10%. The mean of increased
observations will be:
A) 10
(B) 1.1
(C) 10.1
7. The sample mean of first n natural numbers is:
(A) n(n+ 12
(B) (n+ 1)/2
(C) 1/2
(D) (1) 2
8. The sum of deviations is zero when deviations are taken from:
(А) Mean
(B) Median
(C) Mode
(D) Geometrienen
Answer:
6 Answer. If each observation is increased by 10% , then the sum is increased by 10%. Hence the mean is also increase by 10%.
7 a
8 c