What are the mean and standard deviation of a binomial

jamessinatraaa

jamessinatraaa

Answered question

2022-01-19

What are the mean and standard deviation of a binomial probability distribution with n=9 and p=1132?

Answer & Explanation

Alex Sheppard

Alex Sheppard

Beginner2022-01-19Added 36 answers

mean =np
s.d.=npq
Explanation:
Using the formula for mean and s.d. above ...
mean=9×1132=99323.09
s.d.=9×1132×(11132)1.425
twineg4

twineg4

Beginner2022-01-20Added 33 answers

Formula:
μ=np
=91132
=3.06
σ2=np(1p)
=91132(11132)
=2.01
And finally, taking square root to the variance we get that the population standard deviation is:
σ=σ2=2.01=1.42

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