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NCERT Solutions for Class 9 Maths Chapter 14 Statistics Ex 14.4

NCERT Solutions for Class 9 Maths Chapter 14 Statistics Ex 14.4 are part of NCERT Solutions for Class 9 Maths. Here we have given NCERT Solutions for Class 9 Maths Chapter 14 Statistics Ex 14.4.

  • Statistics Class 9 Ex 14.1
  • Statistics Class 9 Ex 14.2
  • Statistics Class 9 Ex 14.3
  • Statistics Class 9 Ex 14.4
Board CBSE
Textbook NCERT
Class Class 9
Subject Maths
Chapter Chapter 14
Chapter Name Statistics
Exercise  Ex 14.4
Number of Questions Solved 6
Category NCERT Solutions

NCERT Solutions for Class 9 Maths Chapter 14 Statistics Ex 14.4

Ex 14.4 Class 9 Maths Question 1.
The following number of goals were scored by a team in a series of 10 matches:
2,3, 4, 5, 0,1, 3, 3, 4, 3. Find the mean, median and mode of these scores.
Solution.
NCERT Solutions for Class 9 Maths Chapter 14 Statistics Ex 14.4.1

Ex 14.4 Class 9 Maths Question 2.
In a mathematics test given to 15 students, the following marks (out of 100) are recorded :
41, 39, 48, 52, 46, 62, 54, 40, 96, 52, 98, 40, 42, 52, 60 Find the mean, median and mode of this data.
Solution.
NCERT Solutions for Class 9 Maths Chapter 14 Statistics Ex 14.4.2
NCERT Solutions for Class 9 Maths Chapter 14 Statistics Ex 14.4.3
Ex 14.4 Class 9 Maths Question 3.
The following observations have been arranged in ascending order. If the median of the data is 63, find the value of x.29, 32, 48, 50, x,x + 2, 72, 78, 84,95
Solution.
NCERT Solutions for Class 9 Maths Chapter 14 Statistics Ex 14.4.4

Ex 14.4 Class 9 Maths Question 4.
Find the mode of 14, 25,14, 28, 18,17,18,14, 23, 22,14 and 18.
Solution.
The given data is, 14, 25, 14, 28, 18, 17, 18, 14, 23, 22, 14, 18 Arranging the data in ascending order, we have 14, 14, 14, 14, 17, 18, 18, 18, 22, 23, 25, 28
Here 14 occurs most frequently (4 times).
∴ Mode = 14

Ex 14.4 Class 9 Maths Question 5.
Find the mean salary of 60 workers of a factory from the following table:

Salary (in Rs.) Number of workers
3000 16
4000 12
5000 10
6000 8
7000 6
8000 4
9000 3
1000 1
Total 60

Solution.

Salary (In Rs.) Number of workers  fixi
3000 16 48000
4000 12 48000
5000 10 50000
6000 8 48000
7000 6 42000
8000 4 32000
9000 3 27000
1000 1 10000
Total \(\sum _{ i=1 }^{ 8 }{ { f }_{ i }=60 } \)

\(\sum _{ i=1 }^{ 8 }{ { f }_{ i }{ x }_{ i }=305000 } \)

NCERT Solutions for Class 9 Maths Chapter 14 Statistics Ex 14.4.5

 

Ex 14.4 Class 9 Maths Question 6.
Give one example of a situation in which
(i) the mean is an appropriate measure of central tendency.
(ii) the mean is not an appropriate measure of central tendency but the median is an appropriate measure of central tendency.
Solution.
(i) Mean marks in a test in mathematics.
(ii) Average beauty

We hope the NCERT Solutions for Class 9 Maths Chapter 14 Statistics Ex 14.4 help you. If you have any query regarding NCERT Solutions for Class 9 Maths Chapter 14 Statistics Ex 14.4, drop a comment below and we will get back to you at the earliest.

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