For each of the following populations of measurements, state whether the sampling distribution of the sample mean is normally distributed, approximately normally distributed, or not approximately normally distributed when computed from samples of size (A) 10, (B) 50, and (C) 200.

(a) The logarithm of metabolic ratios. The population is normally distributed.

(b) Resting vagal tone in healthy adults. The population is normally distributed.

(c) Insulin action in obese subjects. The population is not normally distributed.