Homework SourseAn experiment involves selecting a random sample of 275 midd
An experiment involves selecting a random sample of 275 middle managers study. One item of interest is their mean annual income. The sample mean is computed to be $35,420 and the sample standard deviation is $2,206. What is the standard error of the mean?
| $2,206 | |
| $133.027 | |
| $8.022 | |
| $16.583 |
Solution
the standard error of the mean =s/vn
=2206/sqrt(275)
=133.0268
Answer: $133.027
