A distribution for the weights (in pounds) of a population of four year old boys is displayed below.
The population has a mean of 40 pounds and a standard deviation of 3 pounds. Each of the other three graphs labeled A to C represent possible distributions of sample means for random samples drawn from the population.
Which graph best represents a distribution of sample means for 600 samples each with a sample size of 5?
Graph B
Graph A
Graph C