The Statistics of Crosstabs and More

http://www.greenbook.org/marketing-research.cfm/survey-tabulation-basics-statistics-03377

The article above provides a clear break down of how crosstabs and other survey data analyses are described statistically. It covers the descriptive statistic sand goes on to break down the meaning of the mean, median, and mode of the data as well as standard deviation and standard error. For all of you lucky readers at home, the mean is the average, the median is the middle value of a data set, and the mode is the number that occurs most often.

Standard Deviation and Standard error provide insight regarding the mean of a distribution. Standard Deviation describes the average distance between a number and the mean. Standard Error reflects the reliability of the mean. A large standard error produces data that is not trustworthy.