Discrete and continuous random variables | Probability and Statistics | Khan Academy

What is the main difference between discrete and continuous random variables?

• Discrete variables are polite, while continuous variables are not.

• Discrete variables take on distinct, separate values, while continuous variables can take any value in an interval.

• Discrete variables are always positive, while continuous variables can be negative.

• Discrete variables are used in algebra, while continuous variables are used in geometry.

If a random variable X represents the outcome of a fair coin flip (1 for Heads, 0 for Tails), what type of random variable is X?

• Continuous

• Infinite

• Discrete

• Dependent

The exact mass of a randomly selected animal at a zoo is an example of what type of random variable?

• Discrete

• Continuous

• Categorical

• Binary