Do I use Binomdist?

#1
If the manufacturer is allowed 2 footballs out of a random selected 10 to be more than X circumference. The manufacturer has found that 1 out of ten fails to meet specs.

What is P(x> 3)?

Do I use the Binomdist?

I have a formula that I can’t locate the last value

δ = sqrt(n*p*?)
can you help?
 
#4
hopeful,

in your second post you are using the normal approximation tot he binomial distribution, which would not be a good choice in this case because to few football are being sampled.

use the binomial distribution.

jerry