I need help with statistics homework.?
According to the Federal Communications Commission, 70% of all U.S. households have vcrs. In a
random sample of 15 households, what is the probability that the number of households with vcrs
is between 10 and 12, inclusive?
How do I get the answer using my TI calc?
Thanks! I calculated all three: .2061+ .2186, +1700 = .5947.
The answers I can choose from are
maybe my rounding is off a bit??
- norcekriLv 79 years agoFavorite Answer
You use it to calculate the probability of each of the three cases: 10, 11, and 12 VCRs.
For each case, use the binomial formula for n = 15; i = 10, 11, 12; p = 0.70
p = [ n! / (n-i)! i! ] p^i(1-p)^(n-i)
Can you take it from there?
It's almost certain that someone has rounded incorrectly. The .0001 difference strongly suggests that "C" is the correct answer.