NCERT Solutions for Class 11 Statistics Chapter 3 Organisation Of Data

NCERT Solutions for Class 13Statistics Chapter 3 Organisation Of Data – Here are all the NCERT solutions for Class 11 Statistics Chapter 3. This solution contains questions, answers, images, explanations of the complete chapter 3 titled Organisation Of Data taught in Class 11. If you are a student of Class 11 who is using NCERT Textbook to study Statistics, then you must come across chapter 3 Organisation Of Data. After you have studied lesson, you must be looking for answers of its questions. Here you can get complete NCERT Solutions for Class 11 Statistics Chapter 3 Organisation Of Data.

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NCERT Solutions Class 11 Statistics Chapter 3 Organisation Of Data

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Here on AglaSem Schools, you can access to NCERT Book Solutions in free pdf for Statistics for Class 11 so that you can refer them as and when required. The NCERT Solutions to the questions after every unit of NCERT textbooks aimed at helping students solving difficult questions.

For a better understanding of this chapter, you should also see summary of Chapter 3 Organisation Of Data , Statistics, Class 11.

Class	11
Subject	Statistics
Book	Statistics For Economics
Chapter Number	3
Chapter Name	Organisation Of Data

NCERT Solutions Class 11 Statistics chapter 3 Organisation Of Data

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Class 11, Statistics chapter 3, Organisation Of Data solutions are given below in PDF format. You can view them online or download PDF file for future use.

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NCERT Solutions for Class 11 Statistics (Statistics for Economics) Chapter 3 Organisation of Data Download

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Question & Answer

Q.1: Which of the following alternatives is true?
(i) The class midpoint is equal to:
(a) The average of the upper class limit and the lower class limit.
(b) The product of upper class limit and the lower class limit.
(c) The ratio of the upper class limit and the lower class limit.
(d) None of the above.


(ii) The frequency distribution of two variables is known as
(a) Univariate Distribution
(b) Bivariate Distribution
(c) Multivariate Distribution
(d) None of the above


(iii) Statistical calculations in classified data are based on
(a) the actual values of observations
(b) the upper class limits
(c) the lower class limits
(d) the class midpoints


(iv) Range is the
(a) difference between the largest and the smallest observations
(b) difference between the smallest and the largest observations
(c) average of the largest and the smallest observations
(d) ratio of the largest to the smallest observation

Ans : (i) (a) The average of the upper class limit and the lower class limit.
(ii) (b) Bivariate Distribution
(iii) (d) the class midpoints
(iv) (a) difference between the largest and the smallest observations

Q.2: Can there be any advantage in classifying things? Explain with an example from your daily life.

Ans : Yes, there are many advantages of classifying things. These are: It saves our time and energy by making easy to locate a specific data. It facilitates the analysis, tabulation and interpretation. It makes data comparable. It is also easy to summarise. For example: We make specific notebook for each subject.

Q.3: What is a variable? Distinguish between a discrete and a continuous variable.

Ans : A measurable characteristic whose value changes overtime is called variable. It refers to that quantity which keeps on changing and which can be measured by some unit. For example, if we measure the height of students of a class, then height is regarded as a variable. A variable can be either discrete or continuous.

Q.4: Explain the ‘exclusive’ and ‘inclusive’ methods used in classification of data.

Ans : Exclusive method: The classes, by this method, are formed in such a way that the upper class limit of one class equals the lower class limit of the next class for example, 0-10, 10-20, and so on . Thus, the continuity of the data is maintained. The upper class limit is excluded but the lower class limit of a class is included in the interval. This method is most appropriate for data of continuous variables. 
Inclusive method: This method does not exclude the upper class limit in a class interval. It includes the upper class in a class. Thus both class limits are parts of the class interval for example, 1-5, 6- 10, 11-15 and so on. The interval 1-5 includes both the limits i.e. 1 and 5.

Q.5: Use the data in Table 3.2 that relate to monthly household expenditure (in Rs) on food of 50 households and
(i) Obtain the range of monthly household expenditure on food.
(ii) Divide the range into appropriate number of class intervals and obtain the frequency distribution of expenditure.
(iii) Find the number of households whose monthly expenditure on food is
(a) less than Rs 2000
(b) more than Rs 3000
(c) between Rs 1500 and Rs 2500

Ans : (i) Range = Highest Value - Lowest Value 
Highest Value = 5090 Lowest Value = 1007 
so, Range = 5090 - 1007 = 4083


(ii) 



(iii) (a) Number of households whose monthly expenditure on food is less than Rs 2000 = 20 + 13 = 33 
(b) Number of households whose monthly expenditure on food is more than Rs 3000 = 2+1+2+0+1=6
(c) Number of households whose monthly expenditure on food is between Rs 1500 and Rs 2500 = 13+6 = 19

NCERT / CBSE Book for Class 11 Statistics

You can download the NCERT Book for Class 11 Statistics in PDF format for free. Otherwise you can also buy it easily online.

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