Question

the first two moment of distribution about origin are 1,4 then mean and standard deviation are​

Answer 1

Explanation:

[*MEAN* ]

SKp =3( Mean - Media)

= 3(Mean-4)

mean=(4-3)

=1

Answer 2

Given:

Numbers 1 and 4.
To find:

Mean and standard deviation.

Explanation:
Steps to calculate mean:

Mean= Sum of observation / no. of observation

Mean= 1+4 / 2
Mean= 5/2
Mean= 2.5

Steps to calculate standard deviation:

SD= $x=∑ x/n$
SD= 1+4 / 2
    = 5/2 = 2.5
Therefore,
Standard Deviation=2.5.