48. The Central Limit Theorem implies that

a) All variables have approximately bell-shaped sample distributions if a random sample contains at least 30 observations.

b) Population disuibutions are nonnal whenever the population size is large.

c) For large random samples. the sampling distribution of Y is approximately nonnal. regardless of the shape of the population distribution.

d) The sampling distribution looks more like the population distribution as the sainple size increases

e) All of the above.