Suppose that 5% of the first batch of engines off a new..

[lisa.]

Binomial distributions

Suppose that 5% of the first batch of engines off a new production line have flaws. An inspector randomly selects six engines for testing.

a) show the probability distribution for the number of flawed engines in the sample.

ok so I started the problem this way:

p(o) = 6C0 * .05(TO THE 0 EXPONENT) * (1-.05)(TO THE 6 EXPONENT - 0)
this is wrong

thanks

 

[tkhunny]

Re: Suppose that 5% of the first batch of engines off a new.

p(o) = 6C0 * .05(TO THE 0 EXPONENT) * (1-.05)(TO THE 6 EXPONENT - 0)

I can't really understand what you are writing.

Pr(0) = 6C0*(0.05^0)*(0.95^6)
Pr(1) = 6C1*(0.05^1)*(0.95^5)
Pr(2) = 6C2*(0.05^2)*(0.95^4)
Pr(3) = ...

You do the rest.

 

[lisa.]

thanks thats what i wrote but i didnt know how to put the exponents in so i put it in brackets..