AP Statistics Binomial and Geometric Probability

The table represents the probability of guessing correct on a 5 question true-false quiz.  Is it unusual to get 0 correct?

• No, since the probability is less than or equal to .05.

• Yes, since the probability is less than or equal to .05

• No, since the probability is greater than .05.

• Yes, since the probability is greater than .05.

• Mean =7.92
  Variance =  2.6928
  Standard Deviation = 1.64
• Mean = 12 
  Variance = .66
  Standard Deviation = .44
• Mean = 12
  Variance = 7.92
  Standard Deviation = 2.814
• Mean =7.92
  Variance = 1.64
  Standard Deviation = 2.6928 

• Not a binomial experiment
• Yes. n = 8
  p = .85 
  q = .15
   x = 0, 1, 2, 3, 4, 5, 6, 7, 8
• Yes. n = 8
  p = .15 
  q = .85
   x = 0, 1, 2, 3, 4, 5, 6, 7, 8
• Yes. n = 8
  p = .85 
  q = .15
   x = 8

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

Lilah flips a coin. What is the chance the coin comes up with the first tails in fewer than 5 flips?

• geometcdf(1/2, 5)

• geometpdf(1/2, 5)

• geometcdf(1/2, 4)

• geometpdf(1/2, 4)

The probability that Jalen makes a free throw is 75%. What is the probability he makes his first free throw on his third attempt?

• geometcdf(3, 0.75)

• geometpdf(0.75, 3)

• geometpdf(3, 0.75)

• geometcdf(0.75, 3) 

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