Complete parts(a) and(b) using the probability distribution below.The number of overtime hours worked in

one week per employee

Overtime hours     Probability

0                                     .034

1                                     .092

2                                     .160

3                                     .267

4                                      .223

5                                      .150

6                                      .073

Find the mean, variance, and standard deviation of the probability distribution

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