Question

if mean and Sd of x are a and b respectively, then the SD of x-a/b is​

Answer 1

Answer:

8.09

Step-by-step explanation:

Step 1.

x x²

53 2809

52 2704

61 3721

60 3600

64 4096

Σx=290 Σx²=16930

•n=5

Step 2 ,Calculation of SD.

SD=√ Σx2/n-( Σx/n) ²

=√ 16930/5-(290/5)²

=√ 3386-3364

=√ 22

=4.69

Step 3.Calculation of Mean.

Mean=Σx/n

=290/5

=58.

Step 4, Calculation of co-efficient of variation.

Co-efficient of variation= SD/Mean×100

=4.69/58×100

=469/58

=8.09.

Answer 2

Answer:

ans: option (b) 1

pleas refere attachment of image.