NCERT Solutions for Class 11 Maths Chapter 15 Statistics Ex 15.1

NCERT Solutions for Class 11 Maths Chapter 15 Statistics Ex 15.1 are part of NCERT Solutions for Class 11 Maths. Here we have given NCERT Solutions for Class 11 Maths Chapter 15 Statistics Ex 15.1.

• Statistics Class 11 Ex 15.2
• Statistics Class 11 Ex 15.3

Board	CBSE
Textbook	NCERT
Class	Class 11
Subject	Maths
Chapter	Chapter 15
Chapter Name	Statistics
Exercise	Ex 15.1
Number of Questions Solved	12
Category	NCERT Solutions

NCERT Solutions for Class 11 Maths Chapter 15 Statistics Ex 15.1

Find the mean deviation about the mean for the data in Exercises 1 and 2.

Ex 15.1 Class 11 Maths Question 1.
4, 7, 8, 9, 10, 12, 13, 17
Solution:
Mean of the given data is

Ex 15.1 Class 11 Maths Question 2.
38, 70, 48, 40, 42, 55, 63, 46, 54, 44
Solution:
Mean of the given data is

Ex 15.1 Class 11 Maths Question 3.
13, 17, 16, 14, 11, 13, 10, 16, 11, 18, 12, 17
Solution:
Arranging the data in ascending order, we have
10, 11, 11, 12, 13, 13, 14, 16, 16, 17, 17, 18
Here n = 12 (which is even)
So median is the average of 6th and 7th observations

Ex 15.1 Class 11 Maths Question 4.
36, 72, 46, 42, 60, 45, 53, 46, 51, 49
Solution:
Arranging the data in ascending order, we have 36, 42, 45, 46, 46, 49, 51, 53, 60, 72
Here n = 10 (which is even)
So median is the average of 5th and 6th observations

Find the mean deviation about the mean for the data in Exercises 5 and 6.

Ex 15.1 Class 11 Maths Question 5.

Solution:

Ex 15.1 Class 11 Maths Question 6.

Solution:

Find the mean deviation about the median for the data in Exercises 7 and 8.

Ex 15.1 Class 11 Maths Question 7.

Solution:

Ex 15.1 Class 11 Maths Question 8.

Solution:

Find the mean deviation about the mean for the data in Exercises 9 and 10.

Ex 15.1 Class 11 Maths Question 9.

Solution:

Ex 15.1 Class 11 Maths Question 10.

Solution:

Ex 15.1 Class 11 Maths Question 11.
Find the mean deviation about median for the following data:

Solution:

Ex 15.1 Class 11 Maths Question 12.
Calculate the mean deviation about median age for the age distribution of 100 persons given below:


[Hint: Convert the given data into continuous frequency distribution by subtracting 0.5 from lower limit and adding 0.5 to the upper limit of each class interval]
Solution:

 

We hope the NCERT Solutions for Class 11 Maths Chapter 15 Statistics Ex 15.1 help you. If you have any query regarding NCERT Solutions for Class 11 Maths Chapter 15 Statistics Ex 15.1, drop a comment below and we will get back to you at the earliest.