How do I find the z-score to the following scores, sample n = 25, Mean M = 60, Standard Deviation s = 12?

1 Answer
May 22, 2015

Looking at your data given, I would assume the you wont be looking for a #z#-score, but you would be looking for a #t#-score, the score related to the Student t Distribution...

Thus to calculate the #t#-score you would use the formula:

# t = (barX - mu)/(s/sqrt(n))#

where in this case, you would have a formula of:

# t = (barX - 60)/(12/sqrt(25))#

The Student t Distribution has also got a table similar to that of the Standard Normal Distribution, of where you could get necessary values.