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

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NCERT Class 12 Practical Geography Chapter 2: Data Processing Statistics | CBSE | English

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?
Data Processing

Mean (Ungrouped Data)

Mean (Ungrouped Data)
50
40
15
15

Mean (Ungrouped Data) Shortcut Method

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)

Mean (Grouped Data)
ClassMid-point

Units

(f)

0 - 102
10 - 204
20 - 303
30 - 401
40 - 505

Mean (Grouped Data) Shortcut Method

Mean (Grouped Data) Shortcut Method
ClassMid-point

Units

(f)

0 - 102
10 - 204
20 - 303
30 - 401
40 - 505
  • 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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