Chapter 3

which of the following are important properties of the arithmetic mean?

I.E. the sum of the deviations is zero all of the values in the data are used in calculating the mean there is only one mean for a set of data

which of the following are used to measure dispersion?

range standard deviation variance

the population mean is:

the arithmetic mean of the values in the population

the median is defined as

the midpoint of the values after they have been arranged in rank order

when you calculate the sample mean, you divide the sum of the values in the sample by

the number of observations in the sample