RD Sharma Class 9 Solutions Chapter 22 Tabular Representation of Statistical Data Ex 22.2

In this chapter, we provide RD Sharma Solutions for Chapter 22 Tabular Representation of Statistical Data Ex 22.2 for English medium students, Which will very helpful for every student in their exams. Students can download the latest RD Sharma Solutions for Chapter 22 Tabular Representation of Statistical Data Ex 22.2 Maths pdf, free RD Sharma Solutions for Chapter 22 Tabular Representation of Statistical Data Ex 22.2 Maths book pdf download. Now you will get step by step solution to each question.

TextbookNCERT
ClassClass 9
SubjectMaths
ChapterChapter 22
Chapter NameTabular Representation of Statistical Data
ExerciseEx 22.2

RD Sharma Solutions for Class 9 Chapter 22 Tabular Representation of Statistical Data Ex 22.2

Question 1.
Define cumulative frequency distribution.
Solution:
Cumulative frequency : In a discrete frequency distribution, the cumulative frequency of a particular value of the variable is the total of all the frequencies of the values of the variable which are less than or equal to the particular value.

Question 2.
Explain the difference between a frequency distribution and a cumulative frequency distribution.
Solution:
The number of times an observation occurs in the given data, is called frequency of the
observation while a cumulative frequency of a particular value of the variable is the total of all the frequencies of the values of the variable which are less than or equal to the particular value.

Question 3.
The marks scored by 55 students in a test are given below:
RD Sharma Class 9 PDF Chapter 22 Tabular Representation of Statistical Data
Prepare a cumulative frequency table.
Solution:
Cumulative frequency table is given below:
Tabular Representation of Statistical Data Class 9 RD Sharma Solutions

Question 4.
Following are the ages of 360 patients getting medical treatment in a hospital on a day:
RD Sharma Class 9 Solution Chapter 22 Tabular Representation of Statistical Data
Construct a cumulative frequency distribution.
Solution:
Cumulative frequency distribution table (less than) is given below:
Class 9 RD Sharma Solutions Chapter 22 Tabular Representation of Statistical Data

Question 5.
The water bills (in rupees) of 32 houses in a certain street for the period 1.1.98 to 31.3.98 are given below:
56, 43, 32, 38, 56, 24, 68, 85, 52, 47, 35, 58, 63, 74, 27, 84, 69, 35, 44, 75, 55, 30, 54, 65, 45, 67, 95, 72, 43, 65, 35, 59.
Tabulate the data and present the data as a cumulative frequency table using 70-79 as one of the class intervals.
Solution:
Highest bill = 95 Lowest bill = 24
Range = 95 – 24 = 71
Cumulative frequency table is given below:
Class 9 Maths Chapter 22 Tabular Representation of Statistical Data RD Sharma Solutions

Question 6.
The number of books in different shelves of a library are as follows:
30, 32, 28, 24, 20, 25, 38, 37, 40, 45, 16, 20, 19, 24, 27, 30, 32, 34, 35, 42, 27, 28, 19, 34,
38, 39, 42, 29, 24, 27, 22, 29, 31, 19, 27, 25, 28, 23, 24, 32, 34, 18, 27, 25, 37, 31, 24, 23,
43, 32, 28, 31, 24, 23, 26, 36, 32, 29, 28, 21.
Prepare a cumulative frequency distribution table using 45-49 as the last class interval.
Solution:
Greatest number = 43
Lowest number =16
Range = 43 – 16 = 27
Cumulative frequency table is given below:
RD Sharma Book Class 9 PDF Free Download Chapter 22 Tabular Representation of Statistical Data

Question 7.
Given below are the cumulative frequencies showing the weights of 685 students of a school. Prepare a frequency distribution table.
RD Sharma Class 9 Book Chapter 22 Tabular Representation of Statistical Data
Solution:
The frequency table of the given cumulative frequency is given below:
Tabular Representation of Statistical Data With Solutions PDF RD Sharma Class 9 Solutions

Question 8.
The following cumulative frequency distribution table shows the daily electricity consumption (in kW) of 40 factories in an industrial state:
RD Sharma Class 9 Maths Book Questions Chapter 22 Tabular Representation of Statistical Data
(i) Represent this as a frequency distribution table.
(ii) Prepare a cumulative frequency table.
Solution:
(i) The frequency distribution table is given below:
RD Sharma Mathematics Class 9 Solutions Chapter 22 Tabular Representation of Statistical Data
(ii) Now cumulative frequency table (more then)
RD Sharma Math Solution Class 9 Chapter 22 Tabular Representation of Statistical Data

Question 9.
Given below is a cumulative frequency distribution table showing the ages of people living in a locality.
RD Sharma Class 9 Questions Chapter 22 Tabular Representation of Statistical Data
Prepare a frequency distribution table.
Solution:
Frequency distribution table is given below:
Maths RD Sharma Class 9 Chapter 22 Tabular Representation of Statistical Data Ex 22.2

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