Measures of central tendency, average, mean, mode, median, mean calculation for grouped data, mean calculation for ungrouped data, example of mean, advantages of mean , disadvantages of mean, calculation of median for ungrouped data, median calculation of grouped data, applications of median, advantages of median, disadvantages of median, example of median, mode calculation for ungrouped data, applications of mode, advantages of mode, disadvantages of mode, mode calculation for grouped data, direct method of mean calculation, indirect method for mean calculation, grouped data, ungrouped data, types of mean, arithmetic mean, harmonic mean, relationship between mean, mode and median, why mean is the appropriate measure of centrality/ central tendency, types of measures of central tendency, why is central tendency measured, importance of measurements of central tendency, best measures of central tendency