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VARIANCE measures how far the values of the data set are from the mean, on average. The average of the squared deviations is the population Example: The following table gives the frequency distribution of the number •To find mode for grouped data, use the following formula:. Mean, Median and Mode. Introduction. Measures of central tendency, or averages, are used in a variety of contexts and form the basis of statistics. Explain how mean, median, and mode can be affected by extreme data values. The mode of a data set is the value that occurs most frequently. EXAMPLE 1. In earlier classes, you have studied measures of central tendency such as mean, mode, median of ungrouped and grouped data. In addition to these measures, median, mode, range, upper and lower quartiles, variance, and standard deviation. A. Finding the Mean. The mean of a set of data is the sum of all values inUses of The Mode. • In nominal data. – Since we cannot use mean or median. • Also in ordinal, interval or ratio data, along. i h d di with mean and median Measures of averages - Mean – median – mode – geometric mean – harmonic mean – computation of the above statistics for raw and grouped data - merits and