TEST-Unit 6 Probability Distributions

Front

What is the probability notation for 'X is greater than 2'?

Back

P(X > 2)

Front

What does P(X > 7) represent?

Back

The probability that the random variable X takes on a value greater than 7.

Front

How do you express 'trapping less than 2 mice' in probability notation?

Back

X < 2

Front

What is the formula for calculating expected value in probability distributions?

Back

Multiply each possible outcome by its probability, and add each product together.

Front

What is the expected value of a discrete random variable?

Back

The long-term average value of repetitions of the experiment it represents.

Front

What is a probability distribution?

Back

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

Front

What is the sum of probabilities in a probability distribution?

Back

The sum of all probabilities in a probability distribution must equal 1.

Front

What does it mean if a probability is 0.5?

Back

There is an equal chance of the event occurring or not occurring.

Front

What is the difference between discrete and continuous probability distributions?

Back

Discrete distributions deal with countable outcomes, while continuous distributions deal with outcomes over a range.

Front

What is the probability of an impossible event?

Back

0 (zero) - it cannot happen.