AP Statistics Binomial Distribution

• Mean = 5.5 
  Variance =  1.57
  Standard Deviation = 2.475
• Mean = 5.0 
  Variance = 5.5
  Standard Deviation = 2.345
• Mean = 10
  Variance = .55
  Standard Deviation = .45
• Mean = 5.5 
  Variance = 2.475 
  Standard Deviation = 1.57 

On an eight question multiple choice quiz with 4 answers for each question, what is the probability of guessing and getting 6 correct answers?

• .004

• .109

• .003

• .9996

On an eight question multiple choice quiz with 4 answers for each question, what is the probability of guessing and getting at least 7 correct answers?

• .00002

• .99998

• .0004

• .9996

The table represents the probability of guessing correct on a 5 question true-false quiz. Find the mean number of questions one gets correct when guessing.

• 2.5

• 3

• 3.5

• 1.5

What is the probability that a family doesn't have a baby girl until their third child?

• 0.13

• 0.15

• 0.05

• 0.88

If the probability that a house in your neighborhood has a dog is 60%, what is the chance that you find a house with a dog before the fifth house?

• 0.97

• 0.99

• 0.02

• 0.04

Peyton Manning completes 67% of his passes. What is the probability that it takes more than four throws to complete his first pass in a game?

• 0.99

• 0.01

• 0.04

• 0.96

If Mobius draws 7 cards out of a deck with replacement, what is the probability that he gets the first heart in 6 attempts or fewer?

• 0.18

• 0.82

• 0.06

• 0.76

The American Red Cross says that about 11% of the U.S. population has Type B blood. A blood drive is being held at your school. What is the probability that the tenth blood donor is the first donor with Type B blood?

• approximately 0.00

• 0.316

• 0.0385 

• 0.279

An algebra 2 test has 6 multiple choice questions with four choices with one correct answer each. If we just randomly guess on each of the 6 questions, what is the probability that you get exactly 3 questions correct? (You need to figure out the p value first. It is not given to you.)

• 0.962

• 0.132

• 0.831

• 0.250