The following probability distribution represents the number of people living in a Household (X), and the probability of occurrence (P(X)).

 The following probability distribution represents the number of people living in a Household (X), and the probability of occurrence (P(X)). Compute the Expected Value (mean), the Variance and the Standard Deviation for this random variable.

    X       1          2          3          4          5          6          7

P(X)    .22      .35      .18        .13       .07      .03       .02