An observation occurring five times in a data is recorded as

, using tally marks.

To represent the population of different towns using bar graph, it is convenient to take one unit length to represent one person.

Pictographs and bar graphs are pictorial representations of the numerical data.

In a pictograph, if a symbol represents 50 books in a library shelf, then the symbol  represents 25 books.

A _______ is a collection of numbers gathered to give some meaningful information.