The following table provides a breakdown of advertising sales representatives of a population according to the number of items sold per day. Number of Items sold 0 1 2 3 4 Number of representatives...

The following table provides a breakdown of advertising sales representatives of a population according to the number of items sold per day.

4.What is the probability that an advertising sales representative sold less than 3 items?

5.Calculate and interpret the expected value.

6.Calculate the variance and the standard deviation.