# Science:MATH105 Probability/Lesson 2 CRV

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In the previous lesson, we defined random variables in general, but focused only on **discrete** random variables. In this lesson, we properly treat **continuous** random variables.

If for example *X* is the height of a randomly selected person in British Columbia, or *X* is tomorrow's low temperature at Vancouver International Airport, then *X* is a continuously varying quantity.

## What This Lesson Covers

In this lesson we discuss

- continuous random variables
- the cumulative distribution function
- the probability density function
- expectation, variance and standard deviation of a continuous random variable

Simply reading the content in this lesson will not be sufficient: students will need to complete a sufficient number of Exercises and WeBWorK problems in order to prepare themselves for the final exam.