When Measures of Central Tendency and Dispersion Are Presented in the Literature

Multiple Choice

When measures of central tendency and dispersion are presented in the literature, the number of cases may vary from variable to variable. This is because________.

A) the researchers only used a subset of their sample for convenience purposes.
B) cases were missing values for that variable.
C) the variable in those cases was measured at a different level.
D) none of these choices are correct.