The document NCERT Solutions - Presentation of Data Commerce Notes | EduRev is a part of the Commerce Course Statistics for Economics - Class XI.

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**Page No 56:**

**Question 1: Bar diagram is a****(i) one-dimensional diagram****(ii) two-dimensional diagram****(iii) diagram with no dimension****(iv) none of the above****Answer: **Bar diagrams are One-dimensional diagrams. These are represented on a plane of two axis and depicts the relationship between the two variables (plotted on the either axis) in form of rectangular bars.**Question 2:Data represented through a histogram can help in finding graphically the****(i) mean****(ii) mode****(iii) median****(iv) all the above****Answer: **Graphically mode can be determined by presenting the data in the form of Histogram. The highest Histogram indicates the modal class. The intersection point of the lines diagonally joining the two top corners of the modal rectangles to the corners of the adjacent Histograms indicates the Modal Value.**Question 3: Ogives can be helpful in locating graphically the(i) mode(ii) mean(iii) median(iv) none of the above**

(ii) cyclicity in data

(iii) seasonality in data

(iv) all the above

Answer:

**Page No 57:**

**Question 8:Histogram and column diagram are the same method of presentation of data (True/False).****Answer:** The above statement is false. This is because Histogram and column diagram are different method of presentation. While the Histogram is a Two-dimensional diagram, the bar diagram is a One-dimensional diagram. Histograms are prepared for the continuous series, whereas the bar diagrams are prepared for the discrete series. Further, Histograms are drawn continuously without any space between two consecutive Histograms, whereas the space is must between two bars in a bar diagram.**Question 9: Mode of a frequency distribution can be known graphically with the help of histogram (True/False).****Answer:** The above statement is true. Graphically, mode can be determined by presenting the data in the form of Histogram. The highest Histogram indicates the modal class. The intersection point of the lines diagonally joining the two top corners of the modal rectangles to the corners of the adjacent Histograms indicates the Modal Value.**Question 10: Median of a frequency distribution cannot be known from the ogives (True/False).****Answer:** The statement is false. Graphically Ogives can be determined by the intersection point of the less than Ogive and more than Ogive. The value of x-axis corresponding to the intersection point indicates the median.**Question 11: What kinds of diagrams are more effective in representing the following?****(i) Monthly rainfall in a year(ii) Composition of the population of Delhi by religion(iii) Components of cost in a factory**

(ii) Composition of the population of Delhi by religion can be represented by a simple bar diagram. Plotting different religion on the x-axis and the number of people on the y-axis, one can easily compare the number of the population religion-wise..

(iii) In order to represent different components of cost in a factory, a pie chart is more effective. The entire circle represents the total cost and various components of costsare shown by different portions of the circle.

Source: Census of India, 2001

We can infer from the above table that the absolute number of the rural non-workers is greater than the absolute number of the urban non-workers. The higher ( lower) share of the rural non-workers (urban non-workers) reveals lower degree of urbanisation in India.

Answer:

And the adjusted frequency will be calculated by dividing the original frequency by adjustment factor.

(i) Present the data in tabular form.

(ii) Suppose you were to present these data in diagrammatic form which

of the diagrams would you use and why?

(iii) Present these data diagrammatically.

(ii) With a view to present the data diagrammatically the multiple bar diagram can be effectively used.

(iii)

Answer:

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52 videos|42 docs

### Diagrammatic Presentation (Part - 2)

- Video | 24:09 min
### Graphic Presentation (Part - 3)

- Video | 10:35 min

- Diagrammatic Presentation (Part - 1)
- Video | 11:51 min
- Chapter Notes - Presentation of Data
- Doc | 3 pages
- Tabular Presentation
- Video | 22:46 min
- Graphic Presentation (Part - 2)
- Video | 21:14 min