FOUNDATION EXAMINATION: SEPTEMBER 2025Foundation
If the sum of ten values is 20 and sum of squares of these values is 80, then the standard deviation is __________
A
(A) 1
B
(B) 2
C
(C) 1/2
D
(D) 4
If the sum of ten values is 20 and sum of squares of these values is 80, then the standard deviation is __________
(A) 1
(B) 2
(C) 1/2
(D) 4