On the Sampling Distribution for the Sample Mean (continuous var) app in artofstat.com, select Skewed for Population Distribtuon. Under "Select sample size (n)" the default is 20. Under "Select how many samples (of size n) you want to simulate drawing from the population", make sure the button with 1 sample is selected. Now click on Draw Sample(s) - two new graphs will appear.

On the middle graph labeled Data Distribution there is a histogram. Note the mean and standard deviation given on the graph. Which of the following statements is true.

Answer choices:

A)The mean is a parameter, but the standard deviation is an estimator.

B) Both the mean and the standard deviation are estimators.

C) The standard deviation is a parameter, but the mean is an estimator.