Question

For a binomial distribution mean = 18 and variance = 4.5 Determine whether
the-skewness of of this distribution is positive or negative.​

Answer 1

Answer:

Fact: In binomial distribution , mean =np and variance =npq

Here given np=4 and npq=3

So q=

4

3

⇒p=1−p=

4

1

Thus n=16

Hence P(X≥1)=1−P(X=0)=1−

16

C

0

p

0

q

16

=1−(

4

3

)

16