Determine Whether the Following Is a Probability Distribution

Essay

Determine whether the following is a probability distribution. If not, identify the requirement that is not satisfied.
- $$\begin{array} { r | r } \mathrm { x } & \mathrm { P } ( \mathrm { x } ) \\\hline 0 & 0.287 \\1 & 0.225 \\2 & - 0.027 \\3 & 0.339 \\4 & 0.080 \\5 & 0.096\end{array}$$