Use statistical software or a graphing calculator to find the mean and the standard deviation of the random variable whose distribution is given in Table 1.

Approach We will use a TI-84 Plus C graphing calculator to obtain the mean and standard deviation. The steps for determining the mean and standard deviation using a TI-83/84 Plus graphing calculator and StatCrunch are given in the Technology Step by- Step.

Table 1

Table 1 x P(x) 0 0.01 1 0.10 2 0.38 3 0.51