# Population Mean, Probability, and Sample

1. Population mean = 19.1

15% of data 22.6

Find standard deviation.

2. Population mean 120

Standard deviation 5.7

What is the probability an individual between 120 and 121.3?

3. Population mean 120

Standard deviation 5.3

Sample n =30

Find probability that the sample mean is between 120 and 121.8.

4. Theatre has 150 seats

Normally 5% no shows (fully occupied)

Find the probability 11 or more seats are no shows.

5. Probability of activity= .54

Sample n =530

Find the probability that at least 261 of n is active.

6. Probability of activity .53

Sample n =192

Find probability active in n >89<109.

7. Women = 26% of unquantified group

Sample n of group = 358

Find the probability > 112 women in n.

8. Probability x = .77

Sample n =300

Find probability > 54 are not x

https://brainmass.com/statistics/probability/finding-standard-deviation-probability-example-questions-317195

#### Solution Summary

Provides steps necessary to find standard deviation and probability.