Data is a collection of observations that can be represented visually to better understand and remember the facts more easily. Data refers to a collection of information in numerical or fact form. Median is the middle value of a set of numbers when arranged in ascending order or is the average of the two middle values if the set contains an even number of numbers.

2.  We know that data is a collection of
observations. Visual representation
of data will help us to understand it better
and remember the facts easily.
 The word ‘data’ means collection of
information in the form of numerical
figures, or a set of given facts.

5. =

6. RANGE

8.  Median is the middle value of the given
numbers or distribution in their ascending
order. Median is the average value of the
two middle elements when the size of the
distribution is even.