The distribution of prices for a certain car model is approximately normal with mean $21,800 The distribution of prices for a certain car model is approximately normal with mean$21,800 and standard deviation \$400. A random sample of 4 cars of the model will be selected. What is the correct unit of measure for the mean of the sampling distribution of ?

A Dollars

B Models

C Cars

D Samples

E There are no units associated with the mean of the sampling distribution