Which of the following conditions must be met in order to make a statistical inference about a population based on a sample if the sample does not come from a normally distributed population?
A
Mu greater-than-or-equal-to 30
B
x Overbar greater-than-or-equal-to 30
C
n greater-than-or-equal-to 30
D
Upper N greater-than-or-equal-to 30