Instruction 5-4
the Following Table Contains the Probability Distribution for X

Short Answer

Instruction 5-4
The following table contains the probability distribution for X = the number of traffic accidents reported in a day in Perth.
$$\begin{array} { | c | c | c | c | c | c | c | } \hline X & 0 & 1 & 2 & 3 & 4 & 5 \\\hline P ( X ) & 0.10 & 0.20 & 0.45 & 0.15 & 0.05 & 0.05 \\\hline\end{array}$$
-Referring to Instruction 5-4,the standard deviation of the number of accidents is ________.