- #1

Biochemgirl2002

- 30

- 1

- Homework Statement
- Consider a binomial random variable with n = 50

trials and p = 1/2.

(A)Is it appropriate to use the normal

approximation to the binomial distribution? If so,

what mean and standard deviation we should we

use when standardizing?

- Relevant Equations
- X~N(mean, std dev^2)

X~N(np,npq) if np>5 and npq>5

a) since np has to be greater than 5,

n*p= 50*.5

=25

so yes, we can use this since it is much larger than 5.

now, for mean, i believe the equation is saying that the mean is np, which is 25

but in this equation we do not have a q value, so this is where my issue begins...

what should i use for my standard deviation?

do i square it once i find out what q is ?

n*p= 50*.5

=25

so yes, we can use this since it is much larger than 5.

now, for mean, i believe the equation is saying that the mean is np, which is 25

but in this equation we do not have a q value, so this is where my issue begins...

what should i use for my standard deviation?

do i square it once i find out what q is ?