A sample of n=100 scores is selected from a population with u= 80 with o= 20. on average how much error is expected between the sample mean and the population mean?
* 0.8 points
* 4 points
* 0.2 points
* 2 points
If random samples, each with n=4 scores, are selected from a normal population with u= 80 and o=36, what is the standard error for the distribution of sample means.
If all possible random samples with n= 36 scores are selected from a normal population with u= 80 and o= 18, and the mean is calculated of each sample, what is the average of all the sample means?
* cannot be determined from the information given
For a particular population a sample n=4 scores has an expected value of 10. for the same population a sample of n= 25 scores would have an expected value of
error between sample and population mean, e = o/sqrt(n) = ...
A few problems of sample expected mean are solved here