Consider the following binomial experiment: a study in a certain community showed that 6% of the people suffer from insomnia. if there are 10,200 people in this community, what is the standard deviation of the number of people who suffer from insomnia?

To determine the standard deviation of the number of people who suffer from insomnia, you need to use the following formula:

= sqr of npq

= √10,200 people in the community x 0.6 people who suffer from insomnia x 0.91 = ?

= √10,200 x 0.6 x 0.91 = √55.143 = 7.43

= 7.43