The document discusses different measures of central tendency - mean, median, and mode. It explains that the mean is the average value, the median is the middle value, and the mode is the most frequently occurring value. For symmetrical distributions, the mean, median, and mode will be equal. However, for skewed distributions or those with outliers, the median generally provides a better indication of central tendency than the mean. The appropriate measure depends on whether the data is continuous, discrete, ordinal or categorical. The median and mode are preferred for skewed, ordinal and categorical data, while the mean works best for symmetrical continuous data.