You have measured several types of consumer household expenditure (on magazines, movies, eating out, vacation….) from a large national sample. You would like to compare the variability of these expenditures. Since each of these is likely to be quite different from the others in terms of what is "typical expenditure", you decide to use….
       
a. mean expenditure       
b. variance in expenditure
c. standard deviation
d. coefficient of variation
e. median expenditure