Stat Unit 4 Test

Front

What is the expected value (mean) in statistics?

Back

The expected value (mean) is the average of all possible values of a random variable, weighted by their probabilities.

Tags

CCSS.HSS.MD.A.2

Front

What is a probability distribution?

Back

A probability distribution is a function that describes the likelihood of obtaining the possible values that a random variable can take.

Tags

CCSS.HSS.MD.A.3

CCSS.HSS.MD.A.4

Front

What are the conditions for a table to be a probability distribution?

Back

1. All probabilities must be between 0 and 1. 2. The sum of all probabilities must equal 1.

Tags

CCSS.7.SP.C.7A

Front

What is the probability of an event that cannot occur?

Back

The probability of an event that cannot occur is 0.

Tags

CCSS.7.SP.C.5

Front

What is the probability of an event that is certain to occur?

Back

The probability of an event that is certain to occur is 1.

Tags

CCSS.7.SP.C.5

Front

How do you calculate the probability of a single event?

Back

P(event) = (Number of favorable outcomes) / (Total number of outcomes).

Tags

CCSS.7.SP.C.7A

Front

What is a discrete random variable?

Back

A discrete random variable is a variable that can take on a countable number of distinct values.

Front

What is the formula for calculating the expected value of a discrete random variable?

Back

E(X) = Σ [x * P(x)], where x is a value and P(x) is the probability of x.

Tags

CCSS.HSS.MD.A.2

Front

What is the significance of simulations in probability?

Back

Simulations help estimate probabilities and outcomes by mimicking random processes.

Tags

CCSS.7.SP.C.8C

Front

In a roulette game, how do you calculate the probability of landing on a specific color?

Back

P(color) = (Number of slots of that color) / (Total number of slots).

Tags

CCSS.7.SP.C.7B