Advertisement Remove all ads

Selina solutions for Concise Mathematics Class 9 ICSE chapter 18 - Statistics [Latest edition]

Advertisement Remove all ads

Chapters

Concise Mathematics Class 9 ICSE - Shaalaa.com

Chapter 18: Statistics

Exercise 18 (A)Exercise 18 (B)
Exercise 18 (A) [Pages 227 - 228]

Selina solutions for Concise Mathematics Class 9 ICSE Chapter 18 Statistics Exercise 18 (A) [Pages 227 - 228]

Exercise 18 (A) | Q 1.1 | Page 227

State, the following variable is continuous or discrete:
number of children in your class.

  • Continuous variable.

  • Discrete variable.

Exercise 18 (A) | Q 1.2 | Page 227

State, the following variable is continuous or discrete:
Distance travelled by car.

  • Continuous variable.

  • Discrete variable.

Exercise 18 (A) | Q 1.3 | Page 227

State, the following variable is continuous or discrete:
Sizes of shoes.

  • Continuous variable.

  • Discrete variable.

Exercise 18 (A) | Q 1.4 | Page 227

State, the following variable is continuous or discrete: Time.

  • Continuous variable.

  • Discrete variable.

Exercise 18 (A) | Q 1.5 | Page 227

State, the following variable is continuous or discrete: Number of patients in a hospital.

  • Continuous variable.

  • Discrete variable.

Exercise 18 (A) | Q 2 | Page 227

Given below are the marks obtained by 30 students in an examination:

08 17 33 41 47 23 20 34
09 18 42 14 30 19 29 11
36 48 40 24 22 02 16 21
15 32 47 44 33 01    

Taking class intervals 1 - 10, 11 - 20, ....., 41 - 50;
make a frequency table for the above distribution.

Exercise 18 (A) | Q 3 | Page 227

The marks of 24 candidates in the subject mathematics are given below:

45 48 15 23 30 35 40 11
29 0 3 12 48 50 18 30
15 30 11 42 23 2 3 44

The maximum marks are 50. Make a frequency distribution taking class intervals 0 - 10, 10-20, .......

Exercise 18 (A) | Q 4.1 | Page 227

Fill in the blank :
 A quantity which can very from one individual to another is called a ............. 

Exercise 18 (A) | Q 4.2 | Page 227

Fill in the blank :
Sizes of shoes are ........... variables.

Exercise 18 (A) | Q 4.3 | Page 227

Fill in the blank :
Daily temperatures is ........... variable.

Exercise 18 (A) | Q 4.4 | Page 227

Fill in the blank :
The range of data 7, 13, 6, 25, 18, 20, 16 is ............

Exercise 18 (A) | Q 4.5 | Page 227

Fill in the blank : 
In the class interval 35 - 46; the lower limit is .......... and the upper limit is .........

Exercise 18 (A) | Q 4.6 | Page 227

Fill in the blank :
The class mark of class interval 22 - 29 is ...........

Exercise 18 (A) | Q 5 | Page 228

Find the actual lower class limits, upper-class limits and the mid-values of the classes:
10 - 19, 20 - 29, 30 - 39 and 40 - 49.

Exercise 18 (A) | Q 6 | Page 228

Find the actual lower and upper-class limits and also the class marks of the classes:
1.1 - 2.0, 2.1 -3.0 and 3.1 - 4.0.

Exercise 18 (A) | Q 7 | Page 228

Use the table given below to find:
(a) The actual class limits of the fourth class.
(b) The class boundaries of the sixth class.
(c) The class mark of the third class.
(d) The upper and lower limits of the fifth class.
(e) The size of the third class.

Class Interval Frequency
30 - 34 7
35 - 39 10
40 - 44 12
45 - 49 13
50 - 54 8
55 - 59 4
Exercise 18 (A) | Q 8.1 | Page 228

Construct a cumulative frequency distribution table from the frequency table given below:

Class Interval Frequency
0 -8 9
8 - 16 13
16 - 24 12
24 - 32 7
32 - 40  15
Exercise 18 (A) | Q 8.2 | Page 228

Construct a cumulative frequency distribution table from the frequency table given below:

Class Interval Frequency
1 - 10 12
11 - 20 18
21 - 30 23
31 - 40 15
41 - 50 10
Exercise 18 (A) | Q 9.1 | Page 228

Construct a frequency distribution table from the following cumulative frequency distribution:

Class Interval Cumulative Frequency
10 - 19 8
20 - 29 19
30- 39 23
40- 49 30
Exercise 18 (A) | Q 9.2 | Page 228

Construct a frequency distribution table from the following cumulative frequency distribution:

C.I C.F
5 - 10  18
10 - 15 30
15 - 20 46
20 - 25 73
25 - 30  90
Exercise 18 (A) | Q 10 | Page 228

Construct a frequency table from the following data:

Marks No. of students
less than 10 6
less than 20 15
less than 30 30
less than 40 39
less than 50 53
less than 60 70
Exercise 18 (A) | Q 11 | Page 228

Construct the frequency distribution table from the following cumulative frequency table:

Ages No. of students
Below 4 0
Below 7 85
Below 10 140
Below 13 243
Below 16 300

(i) State the number of students in the age group 10 - 13.
(ii) State the age-group which has the least number of students.

Exercise 18 (A) | Q 12 | Page 228

Fill in the blank in the following table:

Class interval Frequency Cumulative Frequency
25 - 34 ...... 15
35 - 44 ...... 28
45 - 54 21 ......
55 - 64 16 ......
65 - 74 ...... 73
75 - 84 12 ......
Exercise 18 (A) | Q 13 | Page 228

The value of π up to 50 decimal place is
3.14159265358979323846264338327950288419716939937510
(i) Make a frequency distribution table of digits from 0 to 9 after the decimal place.
(ii) Which are the most and least occurring digits?

Advertisement Remove all ads
Exercise 18 (B) [Page 233]

Selina solutions for Concise Mathematics Class 9 ICSE Chapter 18 Statistics Exercise 18 (B) [Page 233]

Exercise 18 (B) | Q 1 | Page 233

Construct a frequency polygon for the following distribution:

Class-intervals 0-4 4 - 8 8 - 12 12 - 16 16 - 20 20 - 24
Frequency 4 7 10 15 11 6
Exercise 18 (B) | Q 2 | Page 233

Construct a combined histogram and frequency polygon for the following frequency distribution:

Class-Intervals 10 - 20 20 - 30 30 - 40 40 - 50 50 - 60
Frequency 3 5 6 4 2
Exercise 18 (B) | Q 3 | Page 233

Construct a frequency polygon for the following data:

Class-Intervals

10 - 14

15 - 19

20 - 24

25 - 29

30 - 34

Frequency

5

8

12

9

4

Exercise 18 (B) | Q 4 | Page 233

The daily wages in a factory are distributed as follows:

Daily wages (in Rs.)

125 - 175

175 - 225

225 - 275

275 - 325

325 - 375

Number of workers

4

20

22

10

6

Draw a frequency polygon for this distribution.

Exercise 18 (B) | Q 5.1 | Page 233

Draw frequency polygons for each of the following frequency distribution: 

(a) using histogram

(b) without using histogram

C.I

10 - 30

30 - 50

50 - 70 70 - 90 90 - 110 110 - 130 130 - 150
ƒ  4 7 5 9 5 6 4
Exercise 18 (B) | Q 5.2 | Page 233

Draw frequency polygons for each of the following frequency distribution:
(a) using histogram
(b) without using histogram

C.I

5 -15 15 -25 25 -35 35 - 45 45-55 55-65
ƒ  8 16 18 14 8 2
Advertisement Remove all ads

Chapter 18: Statistics

Exercise 18 (A)Exercise 18 (B)
Concise Mathematics Class 9 ICSE - Shaalaa.com

Selina solutions for Concise Mathematics Class 9 ICSE chapter 18 - Statistics

Selina solutions for Concise Mathematics Class 9 ICSE chapter 18 (Statistics) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CISCE Concise Mathematics Class 9 ICSE solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. Selina textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Concise Mathematics Class 9 ICSE chapter 18 Statistics are Variable, Tabulation of Data, Frequency, Frequency Distribution Table, Class Intervals and Class Limits, Cumulative Frequency Table, Graphical Representation of Data, Concepts of Statistics, Frequency Distribution Table, Graphical Representation of Continuous Frequency Distribution.

Using Selina Class 9 solutions Statistics exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in Selina Solutions are important questions that can be asked in the final exam. Maximum students of CISCE Class 9 prefer Selina Textbook Solutions to score more in exam.

Get the free view of chapter 18 Statistics Class 9 extra questions for Concise Mathematics Class 9 ICSE and can use Shaalaa.com to keep it handy for your exam preparation

Advertisement Remove all ads
Share
Notifications

View all notifications


      Forgot password?
View in app×