D Question 1 1 pts Go to artofstat.com, click on Web Apps, scroll down and open the Sampling Distribution of the Sample Mean (Continuous Population). Do not use Discrete Population. Under Select Population Distribution, choose Skewed from the drop down menu. Note the mean and standard deviation given on the graph. Which of the following statements is true? The mean is a parameter, but the standard deviation is an estimator. Both the mean and standard deviation are estimators, Both the mean and standard deviation are parameters, The standard deviation is a parameter, but the mean is an estimator