Probability Distribution Function (PDF) for a Discrete Random Variable · Exercise 1

A company wants to evaluate its attrition rate, or in other words, how long new hires stay with the company. Over the years, the company has established the following probability distribution:

Let X = the number of years a new hire will stay with the company.

Let P(x) = the probability that a new hire will stay with the company x years.

Complete using the data provided.

$$\begin{array}{cc}\text{x}& \text{P(x)}\\ \text{0}& \text{.12}\\ \text{1}& \text{.18}\\ \text{2}& \text{.30}\\ \text{3}& \text{.15}\\ \text{4}& \\ \text{5}& \text{.10}\\ \text{6}& \text{.05}\end{array}$$

OpenStax, Statistics · §4.1 Probability Distribution Function (PDF) for a Discrete Random Variable · Exercise 1