A sample of n=20 has a mean of M = 40. If the standard deviation is s=5, would a score of X= 55 be considered an extreme value? Why or why not?
I understand that the score in question is 3 standard deviations above the mean. But I thought that I would need to convert this to a z score to determine whether it was extreme, but when I do, I get a z score of 3 and I can find that on the unit normal table...but I don't know how to determine whether my score is in the body or the tail. Am I on the right path? I'm really trying here.
2 answers
The scores in the "smaller portion" would tell you how extreme the score is.
The scores in the "smaller portion" in the table would tell you how extreme the score is.
5 answers