What are the conditions that must be met to use a normal model in statistics?

I know that one is that the sample must be less than 10% of the total population but I can't remember the others.





Thanks

What are the conditions that must be met to use a normal model in statistics?
Normal distributions are defined by the variation in the data around the mean. If the distribution of the population matches the classic "bell shaped" curve also known as a Guassian distribution, then it is, by definition, normal. Then the standard deviation can be used to accurately describe the shape of the curve (and the variation in the population). hope this helps.