I think my question has a really simple answer, but I’d still really appreciate your help :)
I’m given that a distribution is negatively skewed with a mean of 55 and a variance of 15, and then am asked: for a random sample of n=80, what is the probability that X is less than 54 and X is between 54 and 58.
I know how to go about this if it was normally distributed which would be to find the expected value of m and then the z-score. I’m wondering if that would be the same for a distribution that is negatively skewed.
Thank you!