Mean, variance, standard deviation

The mean is the same as the (a)  

In this formula for calculating the mean, $$\overline{x}=\frac{\Sigma x}{n}$$ , $$\overline{x}$$ is pronounced x (a)   and stands for the mean value of the dataset.

In this formula for calculating the mean, $$\overline{x}=\frac{\Sigma x}{n}$$ , $$\Sigma$$ is the Greek capital letter (a)   and stands for sum or summation.

This formula for calculating the (a)   , $$\overline{x}=\frac{\Sigma x}{n}$$ , shows that you need to add up all of the values in a dataset and then divide by the count of all the values.

The mean of a dataset is the (a)   of all the values in the dataset.

The mean and the median both summarize the ___ of a data distribution.

The median is (a)   to extreme values or outliers.

Because the median is resistant to extreme values, it is a better choice for summarizing ___ distributions

In the figure, the mean is greater than the median because the distribution is...

When describing a distribution, the mean or median tells you where the center is. The (a)   tells you how much of the data is close to the center and how much is further away.