in a poll about work, 62% of respondents said that their jobs were sometimes or always stressful. twelve workers are chosen at random. part 1 of 2 (a) what is the mean number who find their jobs stressful in a sample of 12 workers? round the answer to two decimal places. the mean number who find their jobs stressful is . part 2 of 2 (b) what is the standard deviation of the number who find their jobs stressful in a sample of 12 workers? round the answer to four decimal places. the standard deviation of the number who find their jobs stressful is .