Stress at work:In a poll about work, 47%

of respondents said that their jobs were sometimes or always stressful. Eight workers are chosen at random.

Part 1 of 2

(a) What is the mean number who find their jobs stressful in a sample of 8

workers? Round the answer to two decimal places.

Part 2 of 2

(b) What is the standard deviation of the number who find their jobs stressful in a sample of 8

workers? Round the answer to four decimal places.