4.1 Discrete vs. continuous variables
Decide whether the random variable x is discrete or continuous. Explain your reasoning. Let x represent the volume of blood drawn for a blood test.
Continuous, because x is a random variable that cannot be counted.
Decide whether the random variable x is discrete or continuous. x represents the number of motorcycle accidents in one year in California.
Discrete
What is the significance of the mean of a probability distribution?
It is the expected value of a discrete random variable.It
What is a discrete probability distribution? What are the two conditions that determine a probability distribution?
-A discrete probability distribution lists each possible value a random variable can assume, together with its probability - The probability of each value of the discrete random variable is between 0 and 1, inclusive, and the sum of all the probabilities is 1
