5 Questions
What is the main purpose of a probability mass function for a discrete random variable?
To calculate the probabilities of different values of the random variable
In constructing a histogram for a discrete random variable, where are the possible values of the variable plotted?
On the horizontal axis
What is the relationship between the sum of probabilities in a probability mass function and the histogram's total area?
They are equal
How is the standard deviation related to the variance of a discrete random variable?
Standard deviation is the square root of variance
What does the formula for variance of a discrete random variable measure?
The spread of data values from their average
Learn about the probability mass function of a discrete random variable and how it is represented in a histogram. Understand the properties of a probability mass function and how to construct a histogram for a discrete random variable with probabilities on the vertical axis and possible values on the horizontal axis.
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