AP Stats Probability Test Review
Questions With 100% Verified
Answers!!!
What three variables do you need to define when working to solve a Binomial PDF or
CDF? CORRECT ANSWERS n, the number of trials
x, the number of successes (may be a range or an exact number
p, the probability of succes
What two variables do you need to define when working to solve a Geometric PDF or
CDF? CORRECT ANSWERS x, the number of successes (may be a range or an exact
number)
p, the probability of success
What is the difference between a binomial and a geometric situation/problem?
CORRECT ANSWERS A binomial probability problem works with a fixed number of
trials (n), while geometric has no set number of trials, so it is assumed to be infinite.
What is the difference between a PDF or CDF situation/problem? CORRECT
ANSWERS A PDF (either binomial or geometric) gives the probability of an exact x
value (number of successes), while a CDF (either binomial or geometric) gives the
probability of a range of values.
What is the equation for finding the mean/expected value in a binomial probability
problem? CORRECT ANSWERS Mea/expected value = number of probability (n) x
probability (p)
M(x) = n x p or E(x) = n x p
What is the equation for finding the standard deviation of a binomial probability
problem? CORRECT ANSWERS Standard Deviation = the square root of (number of
probability (n) x probability (p)) x (1 - probability (p))
Standard Deviation = square root of (n x p)(1 - p)
What is the equation for finding the mean/expected value in a geometric probability
problem? CORRECT ANSWERS Mean/expected value = 1/probability = 1/p
What is the equation for finding the standard deviation of a geometric probability
problem? CORRECT ANSWERS Standard Deviation = square root of (1 - p) / p
squared
Questions With 100% Verified
Answers!!!
What three variables do you need to define when working to solve a Binomial PDF or
CDF? CORRECT ANSWERS n, the number of trials
x, the number of successes (may be a range or an exact number
p, the probability of succes
What two variables do you need to define when working to solve a Geometric PDF or
CDF? CORRECT ANSWERS x, the number of successes (may be a range or an exact
number)
p, the probability of success
What is the difference between a binomial and a geometric situation/problem?
CORRECT ANSWERS A binomial probability problem works with a fixed number of
trials (n), while geometric has no set number of trials, so it is assumed to be infinite.
What is the difference between a PDF or CDF situation/problem? CORRECT
ANSWERS A PDF (either binomial or geometric) gives the probability of an exact x
value (number of successes), while a CDF (either binomial or geometric) gives the
probability of a range of values.
What is the equation for finding the mean/expected value in a binomial probability
problem? CORRECT ANSWERS Mea/expected value = number of probability (n) x
probability (p)
M(x) = n x p or E(x) = n x p
What is the equation for finding the standard deviation of a binomial probability
problem? CORRECT ANSWERS Standard Deviation = the square root of (number of
probability (n) x probability (p)) x (1 - probability (p))
Standard Deviation = square root of (n x p)(1 - p)
What is the equation for finding the mean/expected value in a geometric probability
problem? CORRECT ANSWERS Mean/expected value = 1/probability = 1/p
What is the equation for finding the standard deviation of a geometric probability
problem? CORRECT ANSWERS Standard Deviation = square root of (1 - p) / p
squared
