UsableStats: Why is population shape of concern when estimating a mean? What does sample size have to do with it?

Question 347:

Asked on August 14, 2008

Why is population shape of concern when estimating a mean? What does sample size have to do with it?

Each answer comes with a clear explanation of the concept and detailed calculations.
I provide links to web-calculators and Excel formulas so you can duplicate my steps.
If you have any questions about the answer I'm available via chat and email.
I have a Masters in Education from Stanford University and teach statistics to professionals and students. More about Jeff Sauro
I guarantee my answers. I'll refund your money for an incorrect answer or work to get you the correct answer.
I've helped over 700 students and professionals.
You get priority on new questions asked with the purchase of full-access.