(a) If we have a distribution ofxvalues that is more or less mound-shaped and somewhat symmetric, what is the sample sizenneeded to claim that the distribution of sample meansxfrom random samples of that size is approximately normal?

n

(b) If the original distribution ofxvalues is known to be normal, do we need to make any restriction about sample size in order to claim that the distribution of sample meansxtaken from random samples of a given size is normal?

Yes

No