# SD and SE Questions

For a particular population, a sample of n=4 scores has a standard deviation error of 6. for the same population a sample of n=16 scores have a standard error of

*3

* 8

*2

*6

A sample of n=16 scores has a standard deviation of 4. what is the standard deviation of the population from which the sample is obtained.

* 64

* 2

* 4

*16

A random sample of n= 4 scores is obtained from a population with a mean of u= 80 and a standard deviation of o= 10. if the sample is M=90 what is the z-score for the sample mean? (please explain how to set up and solve this, I've been trying n-M/u ?)

*z= 1.00

* z= 5.00

* z= 2.00

* z= 20.00

https://brainmass.com/statistics/probability/sd-se-questions-584634

#### Solution Summary

A few question related to sample and population mean, SD, SE and z value estimation are solved here.

$2.19