Response:  Population is the entire collection of the dataset for which the information is desired. When we deal with the dataset, then the entire set of data which may be a collection of objects or individuals are called as population.  There are different categories of “summary measures”. When we describe data numerically, then we use various summary measures such as the following:  Mean  Median  Quartiles  Range  Interquartile range (IQR)  Variance  Standard deviation  Out of the above measures, Mean and Median are used for "centre and location of numerical datasets”. Quartiles are used as other measures of location.  Range, IQR, variance and Standard deviation parameters are used for variances in the dataset.