Do you have an Ace Tutor who can verify the formula to achieve the "correct" answer for the following question (?): "Determine the sampling error if the grade point averages for 10 randomly selected students from a class of 125 students has a mean of x = 1.8. Assume the grade point average of the 125 students has a mean of = 2.4."

I was informed that the Sampling Error formula to be:

Sample average (x)minus the Mean () = sampling error

However, I have noticed mixed "answers" on the internet to be either -0.6 or 0.6.

Thus,x(bar) -or1.8 - 2.4 = -0.6

Or, do you believe it should be the other way around ?

Such as 2.4 - 1.8 = 0.6

Please confirm the correct answer and provide explanation.