Mean as one of the valid measures of central tendency simply means the average of either a discrete or
continuous data. It is equal to the sum of all the values in the data divided by the number of values in
the data set.
Median as one of the valid measures of central tendency simply refers to the middle mark. It is the
middle score for a set of data that has been arranged in order of magnitude.
Mode as one of the valid measures of central tendency merely subjects as the most frequent score in a
data set. It signifies to be the most popular option.
Range as a measure of variability is considered to be the easiest measure of data spread. It is simply the
highest data value minus the lowest data value which is substantial to simplify the measure of
variability.
Variance as a measure of variability represents the average of the squared differences from the mean.
Standard Deviation as a measure of variability refers to be the statistic that looks at how far from the
mean a group of number is, by using the square root of the variance.