What assumption is necessary for the confidence interval analysis to work properly? 

A) The population that we are sampling from needs to be approximately normally distributed. 

B) The Central Limit theorem guarantees that no assumptions about the population are necessary. 

C) The sampling distribution of the sample mean needs to be approximately normally distributed. 

D) The population that we are sampling from needs to be at -distribution with n-1 degrees of freedom

Edited by  geometry dash scratch