The mean and standard deviation of number who find their jobs stressful are 7.44 and 1.6814 respectively.
Given,
number of workers chosen , n=12
percentage of respondents =62%
from given data the calculation are done according to binomial distribution,
then,
probability of respondents ,
a)calculating mean,
b)calculating standard deviation,
Thus, the mean and standard deviation of number who find their jobs stressful are 7.44 and 1.6814 respectively.
To learn more about binomial distribution refer here
#SPJ4