Question

For 11 trials that follow a binomial distribution with the probability of failure at 6%. Find the probability of exactly 7 success Using a calculator.

Answer 1

Solution:

Given:

n = number of trials = 11

q = the probability of failure = 6% = 0.06

p = the probability of success = 1 - q = 1 - 0.06 = 0.94

We have to find:

P(  exactly 7 success) =............? using a calculator.

P(X = 7) =..........?

Use following steps in TI 84 plus calculator:

Press 2ND and VARS

Select Binompdf(

Enter numbers:

Click on Paste and press Enter two times.

P( X= 7) = 0.002773409

P( X= 7) = 0.0028

_{( Round final answer to specified number of decimal places)}