Asked by brenda
What formula do I use to solve: A sample with a mean of M = 40 and a variance of s2 = 20 has an estimated standard error of 2 points. How many scores are in the sample?
Answers
Answered by
MathGuru
standard error = s/√n
Note: The square root of the variance is called the Standard Deviation
With your data:
2 = (4.472)/√n
Solve for n.
I hope this is what you were asking.