Question

Will award medals for best answer.
For which of these scenarios could you use the normal approximation to the binomial?

Flip a coin 100 times and count the number of heads.

The number of free throws an 80% shooter will make in five attempts.

The number of free throws an 80% shooter will make in six attempts.

The number of people who have type O blood if the frequency in your population is .7 and you randomly select 6 people.

The number of bats who carry rabies if the frequency in your population is .8 and you select 4 bats.

Answer 1

according to a rule of thumb,
binomial approximation is appropriate if n*p >= 5 and n*(1-p)>=5

Answer 2

Ok so which one do u think it is?

Answer 3

I can't give the answer. plug n and p into that formula