In this video I explain frequency distribution tables and grouped frequency distribution tables for summarizing data. I explain each of the columns, including the variable measured, the frequency, the proportion and percentage of the data at each variable, and the cumulative frequency of scores. I also discuss choosing a class interval for a grouped frequency distribution and the difference between apparent and real limits for class intervals or class boundaries. Next I consider how we can use a grouped frequency distribution table to estimate the mean, variance, and standard deviation by reconstructing a version of the raw data based on the midpoints of the class interval.