Posted by Bee on .
With a known population mean of 100, and a known standard error of the mean of 7.5, what is the probability of selecting at random a sample whose mean is 110 or greater?
I need help getting this started, thanks

Statistics 
MathGuru,
Finding zscore with your data:
z = (110  100)/(7.5)
Finish the calculation. Check a ztable for your probability using the zscore (remember the question is asking "whose mean is 110 or greater" when looking at the table).