Commerce students of Class 11 have Statistics as one of the core subjects in their curriculum. When it comes to Statistics, students require an in-depth understanding of each concept. Regular practice and revision are equally essential to score well in this subject. Thus, apart from textbooks, students also need proper reference material for the lessons. NCERT Solutions are an excellent resource to refer to for Statistics lessons. The first part of the Class 11 Economics syllabus is dedicated to Statistics. Part A or Statistics for Economics include:
Introduction
Collection, Organisation, and Presentation of Data
Statistical Tools and Interpretation
The NCERT Solutions for Class 11 Statistics Chapter 4 PDF will be uploaded soon.
Chapter 4 in this section, is the Presentation of Data. NCERT solutions for class 11 statistics for economics chapter 4 is also available, which covers every topic of the concerned chapter.
Textual Presentation
Tabular Presentation
Diagrammatic Presentation
In a textual presentation of data, data form a part of the text or description pf the subject matter. The tabular presentation of data, on the other hand, shows a systematic presentation of numerical data. The tabular presentation includes various components. They are:
Title
Headnote
Caption
Table number
Body or field
Footnotes
Source
Stubs
Under diagrammatic presentation, bar diagrams are one of the most popular types of data presentation. Different types of bar diagram are:
Simple Bar Diagram
Multiple Bar Diagram
Percentage Bar Diagram
Sub Divided Bar Diagram
All of the above topics have been serially detailed in NCERT solutions class 11 statistics chapter 4. The 15 questions included in this chapter provide a proper insight into â€œPresentation of Dataâ€™.
Each question in the NCERT solutions is followed by a precise, appropriate, and relevant answer. The answers which are given in the solution also follow the CBSE pattern of the exam. This helps students get a brief idea regarding the types of questions they might face in the final exams. Hereâ€™s a gist of all the questions included in the Statistics class 11 NCERT solutions chapter 4:
Question 1: The very first question in this chapter of NCERT solution is regarding bar diagrams. The question asks whether the bar diagram is a one-dimensional, two-dimensional or non-dimensional diagram. Bar diagrams are single-dimensional. Although it contains two axes in the form of rectangular bars, the width plays no role in data presentation. Only length plays a part in bar diagrams.
Question 2: The second question NCERT solutions for class 11 statistics for economics chapter 4 is directed towards histograms. It asks students the use of histograms. Histograms are used to represent the value of mode of frequency distribution through graphs with the help of the highest rectangle.
Question 3: The third question is regarding ogives. It asks if ogives can be helpful in graphically locating the mean, mode, or median. The answer to this question would be â€˜medianâ€™. The point of intersection of more than and less than ogives shows the median of data.
Question 4: The 4th question is NCERT solutions class 11 statistics chapter 4 asks what data represented through arithmetic line graph depict. The options in this question include â€˜long-term trendâ€™, â€˜cyclicity in dataâ€™, and â€˜seasonality in dataâ€™. Arithmetic line graph assists in understanding the periodicity and trend observed in long-term continuous data.
Question 5: The 5th question is based on a true/false statement. The statement given is whether the width of bars in a bar diagram can be unequal. This statement is, however, false. The rectangular bars in a bar diagrams need to be of equal width for any given data.
Question 6: The statement given in this question is â€˜Width of rectangles in a histogram should essentially be equalâ€™. It is a false statement. The width of rectangles in a histogram can be uneven.
Question 7: Here, the statement in question is â€˜Histogram can only be formed with a continuous classification of dataâ€™. This is a true statement. Histograms are always drawn for continuous data. Even if the given data is discrete or discontinuous, it is first changed into continuous form to form a histogram.
Question 8: The statement in this question is Histograms and column diagram are a similar way of presentation of data. However, this is a false statement. The histogram is a two-dimensional diagram which is drawn for continuous data. The rectangles do not have any space between them. On the other hand, the column diagram is a one-dimensional diagram which has space between each column or bar.Â
Question 9: The 9th question has â€˜Mode of a frequency distribution can be known graphically with the help of histogramâ€™ as a statement. This statement in NCERT solutions for class 11 statistics for economics chapter 4 is true. The rectangle with the highest measure in a histogram gives the value of mode of a frequency distribution.Â
Question 10: The statement given in this question is that the median of a frequency distribution cannot be assessed from the ogives. This is false. The point of intersection of less than along with more than ogives shows the median.
Question 11: The 11th question in this chapter asks students to provide relevant forms of diagrams to represent different data. There are three sub-parts to this question. They are:
Monthly annual rainfall
Composition of Delhiâ€™s population by religion
Components of the factoryâ€™s expenses
The relevant answers to the above questions are bar diagram, component bar diagram, and a pie chart respectively.
Question 12: This question in NCERT solutions for class 11 statistics for economics chapter 4 would require students to represent data in a tabular form. The question provides data related to the share of non-workers and lower urbanisation level in India.
Question 13: The 13th question is how the procedure of drawing histograms differ when class intervals are unequal compared to equal class intervals in a frequency table.
Question 14 and Question 15 also include data, based on which students will have to form a relevant presentation.
Students can find the PDF of the Statistics lessons in the Vedantu App. The App also provides a free download option of NCERT solutions for class 11 statistics for economics chapter 4. Along with that, students also get online classes, one-on-one guidance, and revision notes to prepare well for exams.
1. What are the different ways of representing data?
Data can be presented in the form of text, table or diagrams. It depends on the nature and category of data being represented. Under diagrammatic presentation of data, there can be different types. They are bar diagram, pie or circular diagram, frequency diagram data, histogram, polygon, frequency curve, arithmetic line graph, ogive or cumulative curve, etc.
2. What are the advantages of diagrammatic or graphical presentation of data?
Many times the diagrammatic presentation of data is considered more convenient over the other forms. So, the advantages of diagrammatic and graphical presentation of data include:
Informative and catchy
Simple to understand
Easy to compare data
Needs less training or specialisation to create graphs
Helps in the study of correlation
3. Which types of questions are provided in the NCERT solutions for class 11 statistics for economics chapter 4?
Chapter 4 in Class 11 Statistics NCERT solutions includes 15 questions. Some of these questions are conceptual and objective. A few questions in this chapter are based on a â€˜true or falseâ€™ statement. In some questions, students will have to represent the data given to them.
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