A data consists of n observations: x1, x2,…, xn if 2=9n and
2 =5n, then the standard deviation of this data is:
a. |
5 |
b. |
|
c. |
|
d. |
2 |
A data consists of n observations: x1, x2,…, xn if 2=9n and
2 =5n, then the standard deviation of this data is:
a. |
5 |
b. |
|
c. |
|
d. |
2 |
=9n … (1)
=5n …(2)
(1)+(2) )=7n
=6
(1) − (2) 4
=4n
=n
=1
variance = 6−1=5
standard deviation=