In a class of 35 students of geography following marks were obtained out of a 10 mark unit text - 1, 0, 2, 3, 4, 5, 6, 7, 2, 3, 4, 0, 2, 5, 8, 4, 5, 3, 6, 3, 2, 7, 6, 5, 4, 3, 7, 8, 9, 7, 9, 4, 5, 4, 3. Represent the data in the form of a group frequency distribution.

In a tally mark grouping by four and crossing fifth is called.

An ogive is a method in which

If both ends of a group are taken in frequency grouping it is called.

Differentiate between data and information.

What do you mean by data processing?

What is advantage of foot note in a table?

What do you mean by primary sources of data?

Enumerate five sources of secondary data.

Discuss the national and international agencies where from secondary data may be collected.

What is the importance of an index number? Taking an example examine the process of calculating an index number and show the changes.