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.
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= 5.00
* z= 2.00
* z= 20.00
A few question related to sample and population mean, SD, SE and z value estimation are solved here.