. Write the formula of mean deviation method
Mean deviation is used to compute how far the values in a data set are from the middle point. Mean, median, and mode all form middle points of the data set. In different words, the mean deviation is used to calculate the average of the absolute deviations of the data from the central point. Mean deviation may be calculated for each grouped and ungrouped data.
Formula of mean deviation method to calculate both mean and medium:
Mean deviation formula for frequency distribution:
Mean deviation formula for calculating Median:
Mean deviation formula for calculating Mean: