# NCERT Class 12 Practical Geography Chapter 2 Data Processing YouTube Lecture Handouts Part 1

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# Title: Data Processing

• Computers enhance our capabilities in data processing and in drawing graphs, diagrams and maps. Combination of computer hardware and the application software are referred as the Database Management System (DBMS) and the Computer Assisted Cartography.
• What is where? Why is it there? What will happen if it is shifted to a new location? Who will be benefited by such a reallocation? Who are expected to loose the benefits if reallocation takes place?

## Mean (Ungrouped Data)

 50 40 15 15

### Mean (Ungrouped Data) Shortcut Method

 50 40 15 15

A is any arbitrary value in the middle range

d is the sum of coded scores

## Mean (Grouped Data)

 Class Mid-point Units(f) 0 - 10 2 10 - 20 4 20 - 30 3 30 - 40 1 40 - 50 5

### Mean (Grouped Data) Shortcut Method

 Class Mid-point Units(f) 0 - 10 2 10 - 20 4 20 - 30 3 30 - 40 1 40 - 50 5
• When the class interval is equal
• In equal class interval
• In unequal class interval
• In this case of unequal interval, mean is equal to
• The Indirect mean method will work for both equal and unequal class intervals. If we do not consider the interval

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