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.

Question

Quizplus · Accepted Answer

Cases were missing values for that variable, which is a common reason for variations in the number of cases across different variables in statistical analyses. When data for a specific variable is not available for all cases in a sample, the measures of central tendency and dispersion for that variable will be calculated based on the reduced number of cases with available data.

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