Question

19. Case Study based - 3
A group of students decided to make a project on Statistics. They are
collecting the heights (in cm) of their 51 girls of Class IX, A, B and C of their
school. After collecting the data, they arranged the data in the following
frequency distribution table form:
Height (in cm)
Number of girls
135 - 140
4.
140 - 145
7
145 - 150
18
150 - 155
11
155 - 160
6
160 - 165
5
Based on the information, answer the following questions :
(a) Class interval with highest frequency is :
(i) 145 – 150
(ii) 150 - 155
140-145
(iv) 155 - 160
(b) What is the width of the class?
(0)
10
(ii) 15 (iii) 5 (iv) 20
Scanned with CamScanner
(c) How many students of the height 150cm and below are there?
(0) 40
(ii) 29
(111) 18 (iv) 22
(d) How many students of the height 145cm and above are there ?
40
(ii) 29 (ii) 18 (iv) 22
(e) How many students of the height more than 145cm but less than
155cm are there?
(1)40
(ii) 29
(11) 18
(iv) 22
20. Case Study based​

Answer 1

Step-by-step explanation:

i 145-150

ii 15

iii 40

iv 18

v 22

Answer 2

Step-by-step explanation:

i 145 to 150

ii 5

iii 29

iv 40