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NCERT Class 12 Geography Chapter 23 Data: Its Source and Compilation
Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. CBSE Class 12 Geography Solutions are part of All Subject Solutions. Here we have given NCERT Class 12 Geography: Fundamentals of Human Geography, Geography: India People and Economy, Geography: Practical Work in Geography. NCERT Class 12 Geography Chapter 23 Data: Its Source and Compilation Notes, NCERT Class 12 Geography Textbook Solutions for All Chapters, You can practice these here.
Data: Its Source and Compilation
Chapter: 23
PART – III PRACTICAL WORK IN GEOGRAPHY
Very Short Type Questions Answer
1. Define data.
Ans: The data are defined as numbers that represent measurements from the real word. In other words numerical information is called data.
2. Give three examples of diagrams.
Ans: Bar graphs, Pie graphs and Line graphs.
3. Name two sources of data.
Ans: Primary sources and secondary sources.
4. Name two axes of diagrams.
Ans: x-axis and y-axis.
5. What is ogive?
Ans: A curve obtained by plotting the cumulative frequencies are called ogive.
6. What is frequency polygon?
Ans: Frequency polygon is a graph showing the frequency distribution. It is drawn by joining the middle points of the upper side of the adjacent rectangles or bars of the histogram with straight lines.
7. What do you mean by classification of data?
Ans: Arranging the data in a table.
8. Expand NATMO.
Ans: National Atlas and Tabulation and Thematic Mapping Organisation.
9. Who was the first cartographer?
Ans: Turin Peppar.
Other Textual Questions & Answers
1. Choose the right answer from the four alternatives given below:
(i) A number or character which represent measurement its called.
(a) Digit.
(b) Data.
(c) Number.
(d) Character.
Ans: (b) Data.
(ii) A single datum is a single measurement from the:
(a) Tables.
(b) Frequency.
(c) Real word.
(d) Information.
Ans: (c) Real word.
(iii) In a tally mark grouping by four and crossing fifth is called.
(a) Four and cross method.
(b) Tally marking method.
(c) Frequency Plotting Method.
(d) Inclusive Method.
Ans: (a) Four and cross method.
(iv) An ogive is a method in which:
(a) Simple frequency is measured.
(b) Cumulative frequency is measured.
(c) Simple frequency is plotted.
(d) Cumulative frequency is plotted.
Ans: (b) Cumulative frequency is measures.
(v) If both ends of a group are taken in frequency grouping it is called.
(a) Exclusive method.
(b) Inclusive method.
(c) Marking method.
(d) Statistical method.
Ans: (a) Exclusive method.
2. Answer the following questions in about 30 words:
(i) Differentiate between data and information.
Ans: Data: The data are defined as numbers that represent measurement from the real word. The numerical information is called data.
Information: The information is defined as either a meaningful answer to a query or a meaningful stimulus that can cascade into further queries.
(ii) What do you mean by data processing?
Ans: Data processing means tabulation of data. Processing of raw data requires their tabulation and classification in n, classes. For example, the data given in the following table can be used to understand how they are processed.
Score of 60 students in photography paper:
| 47 | 2 | 39 | 64 | 22 | 46 | 28 |
| 2 | 9 | 10 | 89 | 96 | 74 | 06 |
| 26 | 15 | 92 | 84 | 84 | 90 | 32 |
| 22 | 53 | 62 | 73 | 57 | 37 | 44 |
| 67 | 50 | 18 | 51 | 36 | 58 | 28 |
| 65 | 63 | 59 | 75 | 70 | 56 | 58 |
| 43 | 74 | 64 | 12 | 35 | 42 | 68 |
| 80 | 64 | 37 | 17 | 31 | 41 | 71 |
| 56 | 83 | 59 | 90 |
First step is to group data in order to reduce its volume and make it easy to understand.
(iii) What is the advantage of a footnote in a table?
Ans: A footnote in a table gives the relevant information about the data collected from a particular source.
(iv) What do you mean by primary sources of data?
Ans: Primary sources of data are those which are collected for the first time by an individual or the group of individuals, institutions, organisations.
(v) Enumerate five sources of secondary data.
Ans: The sources of secondary data are:
(i) Government publications.
(ii) Semi/quasi government publications.
(iii) International publications.
(iv) Private publications.
(v) Newspapers and magazines.
(vi) Electronic.
