Write any four Merits of Mean.
Merits of Mean are as follows:
1. Certainity : Arithemetic Mean is a certain value. It has no scope for estimated values.
2. Based on all items : Arithmetic Mean is based on all the items in a series. It is therefore, represehtative value of the different items.
3. Simplity : From the view point of calculation and use, arithmetic mean is the simplest of all the measures of central tendency.
4. Stability : Arithmetic Mean is a stable measure of central tendency. This is because, changes in the sample of a series having minimum effect or the arithmetic average series.