In Statistics we play with data. data is in organized form rather than raw data.

# Grouped vs. Ungrouped Data

**Grouped data :** Organized data is presented in a tabular form

**Ungrouped Data:** Unorganized data presented as raw data.

**interval:**

Next interval must be start where previous left. if that is not a case during problem solving we have to make new interval.

**Lets understand the concept **

**Mean **= ∑fi xi / ∑fi

Here,

**∑** sigma represents the summation

**xi** represents midpoint

**fi** represents the number of observations .

**Median**

**Mode**