Unit 6 Review

The probabilities in the distribution must equal 1.

• True

• False

Probabilities within the distribution lie between -1 and 1.

• True

• False

What are the three probability distribution requirements?

• There is a numerical (not categorical) random variable X, and each of the values of X has an associated probability with it.

• The sum of all the probabilities in the distribution must equal 1.

  
  

• 0≤P(X)≤1 for all probabilities in the distribution.

• There is a categorical (not numerical) random variable X, and each of the values of X has an associated probability with it.

Which of the following random variables says that inequalities do not matter.

• Discrete

• Binomial

• Continuous

• Geometric

The area under curve must equal one.

• True

• False

A binomial random variable is

• Continuous

• Discrete

• Poisson

• Geometric

Your calculator can only do binomcdf with ____, so all inequalities (if you use your calculator) must be converted to that inequality.

• ≤

• =

• <

• >

What are the four requirements for a setting to follow the binomial probability distribution. 

• two possible outcomes

• fixed probability

• independent

• infinite trials

The mean of a discrete random variable X, is the mean outcome for finite many trials.

• True

• False

The function binompdf() is used for calculating....

• P(X=x)

• P(X<x)

• P(X>x)

• P(X ≤ x)