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**Why statistics ?**

**Statistics in plural sense**

**Statistical Data : Primary Data and Secondary Data.**

**Definition of Presentation Of Data**

**Arrangement Of Raw Data (i) Alphabetical order (ii) Ascending order (iii) Descending order**

**Ungrouped Data**

**Frequency Distribution**

**Classes or Class Intervals**

**Discrete frequency distribution**

**Continuous or Grouped Frequency Distribution - (a) Exclusive Method**