Unit 2 : 2.1 : Measures of Central Tendency: Averages
Measures of Central Tendency (Averages) © Statistical data is huge . From this a single figure is calculated, which will represent the data . It will natural to expect that, the representative figure i.e. measure should be more or less close to the most of the members of the data. Hence it lies more or less at the center of the data. It is therefore called as ‘Measure of Central Tendency’. Definition A single figure which represents whole data and lies at center of data la called as ‘Measure of Central Tendency’ or ' Average'. Types There are three main and in all five types of averages. i) Arithmetic Mean (A.M.) (ii) Geometric Mean (G.M.) iii) Harmonic Man (H.M.) iv) Median v) Mode The first three are called as’ Mathematical averages’ & last two are called as ‘Positional averages’. Requirements (Requisites/Characteristics) of an ideal (good) Measure of Central Tendency (Average) i) It should be rigidly defined i.e. It should hav...