AP Statistics Unit 3 Review

Unit 3 Vocabulary

100

What is Sampling?

What is Gathering info from people or
Studying a part in order to gain information about the whole?

200

What is a Voluntary Response Sample?

What is People who volunteer to be in a sample?  

300

What is Varialbility?

What is the reliability of the statistics?

400

What is a Stratified Random Sample?

What is dividing the population into subgroups and perform a simple random sample within each subgroup?

500

What is a Double-Blind experiment?

What is neither the subject nor the person doing the experiment know who has the treatment and who has the placebo neither the subject nor the people who have contact with them know which treatment a subject received?

Random Variable + Constant

100

Random Variable Z has mean = 5 and standard deviation = 6.

Let X = Z - 2

What is the mean of X?

What is 3?

200

Random Variable Z has mean = 5 and standard deviation = 6.

Let X = Z - 2

What is the standard deviation of X?

What is 6?

300

Random Variable Y has mean = 10 and standard deviation = 12.

Let X = Y + 12

What is the mean of Y?

What is 22?

400

Random Variable Y has mean = 10 and standard deviation = 12.

Let X = Y + 12

What is the standard deviation of Y?

What is 12?

500

The random variable Z follows a standard normal distribution.

Let M = Z + 3

Find E(M)

What is 3?

Probability Questions 2

100

If two events, A and B, are independent, to find the probability of A and B, you need to ___________ the probability of A and the probability of B.

What is Multiply or *?

200

Find P(A|B) if 

P(A and B) = 0.4

P(B) = 0.75

What is .53?

300

Given, P(A) = .3 P(B) = .2 P(A and B) = .06.

Are A and B independent?

Yes/ What is yes?

400

P(A and B) = .1

P(A and Not B) = .3

Find P(A)

What is .4?

500

In a standard 52 card deck, what is the probability of drawing a 4 and then drawing a king.

Drawing of cards is done without replacement.

What is .006?

Probability & Distributions Phrases/Terms

100

This type of random variable requires a fixed number of trials.

What is a binomial random variable?

200

The type of variable where the probability distribution assigns probability as the area under the density curve above a specific interval.

What is a continuous random variable?

300

Events that have no outcomes in common and can never occur simultaneously, for which the addition rule is used.

What are mutually exclusive events?

400

The condition involving the population size that must be satisfied to use sigma divided by the square root of n as the standard deviation of a sampling distribution.

What is 'the population is at least 10 times the sample size'?

500

The formula to determine the variance for a discrete random variable with three possible values.

What is sigma sub x squared = (the square of the difference between x sub 1 and mu multiplied by p sub 1) + (the square of the difference between x sub 2 and mu multiplied by p sub 2) + (the square of the difference between x sub 3 and mu multiplied by p sub 3) ?

Probability Scenario Questions

100

What is the probability of rolling a 1 or 2 on a six sided die?

What is 1/3?

200

What is the probability of getting heads three times in a row when flipping a coin?

What is 1/8?

300

There are 5 green balls and 7 red balls. Two balls are selected one by one without replacement. What is the probability that the first is green and the second is red?

What is 35/132 or .2651?

400

What is the probability of drawing an ace from a standard deck of fifty-two cards?

What is 7.69%?

500

There are four different colored marbles in a jar-red, blue, white, and black. How many outcomes are possible if a person picks two of the marbles if the order in which the marbles are picked matters.

What is 12?