# Means, standard errors, expected values

For a population with u=80 and o=20, the distribution of sample means based on n=16 will have expected value of _____ and a standard error of ____.

* 80; 1.25 (this is the one i had chosen at 1st?)

* 80; 5

* 5; 80

* 20; 20

Samples of n=16 scores are selected from a population. If the distribution of sample means has an expected value of 40 and a standard error of 2, what are the mean and standard deviation for the population?

* u=40 and o=32

* u= 40 and o= 8

* u= 160 and o=2

* u=40 and o=2 (this is the one i had 1st chosen??)

A sample of n=4 scores is selected from a population with u=40 and o=8 and the sample mean is M=43. What is the sample error for the sample mean?

*3

*4 (is this correct?)

*8

*2

https://brainmass.com/statistics/probability/means-standard-errors-expected-values-584632

#### Solution Preview

1. Expected value = mean = 80

Standard error = o/sqrt(n) = 20/sqrt(16) = 20/4 = ...

#### Solution Summary

3 problems related to standard error are solved here.