Explanation:
This statistical nomenclature is one of the most important distinctions to understand. PMFs are for discrete random variables. PDFs are for continuous random variables.
(Book 2, Module 13.3, LO 13.d)
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Question 28
A financial analyst has been assigned the task of training new colleagues on basic statistical matters and terminology. She decided that her first presentation would focus on delineating the difference between a probability mass function (PMF) and a probability density function (PDF). Which of the following accurately describes the differences?
A
A PMF provides probabilities for continuous random variables, and a PDF provides probabilities of discrete random variables.
B
A PMF provides probabilities for continuous and discrete random variables, and a PDF provides probabilities of only discrete random variables.
C
A PMF provides probabilities for discrete random variables, and a PDF provides probabilities for continuous random variables.
D
A PMF provides probabilities for discrete random variables, and a PDF provides probabilities for continuous and discrete random variables.
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