arrow
arrow
arrow
What is the median of the following distribution? Class 110-160 160-210 210-260 260-310 310-360 Frequency 16 15 31 24 38
Question

What is the median of the following distribution?

Class

110-160

160-210

210-260

260-310

310-360

Frequency

16

15

31

24

38

A.

245

B.

262

C.

278

D.

260

Correct option is D

Given:
Class Frequency
110-160 16
160-210 15
210-260 31
260-310 24
310-360 38
Formula Used:
Median = L+(N2Cf)×hL + \left( \frac{ \frac{N}{2} - C }{ f } \right) \times h​​
Where:
L = Lower boundary of the median class
N = Total frequency
C = Cumulative frequency of the class before the median class
f = Frequency of the median class
h = Class width
Solution:

Class 
Frequency
Cumulative Frequency
110-160 
16
16
160-210
15
31
210-260
31
62
260-310
 24 
86
310-360
38
124

N = 16 + 15 + 31 + 24 + 38 = 124
N2\frac N2​ = 1242\frac{124}{2}​= 62
This is the class 210-260, as the cumulative frequency is 62.
L = 210 (lower boundary of the median class)
N = 124
C = 31 (cumulative frequency before the median class)
f = 31 (frequency of the median class)
h = 50 (class width, calculated as 260 - 210)
Median=210+(623131)×50Median=210+(3131)×50=210+50=260\text{Median} = 210 + \left( \frac{62 - 31}{31} \right) \times 50\\\text{Median} = 210 + \left( \frac{31}{31} \right) \times 50 = 210 + 50 = 260​​

test-prime-package

Access ‘RRB NTPC’ Mock Tests with

  • 60000+ Mocks and Previous Year Papers
  • Unlimited Re-Attempts
  • Personalised Report Card
  • 500% Refund on Final Selection
  • Largest Community
students-icon
186k+ students have already unlocked exclusive benefits with Test Prime!

Free Tests

Free
Must Attempt

RRB Technician Gr.III Full Mock Test 1

languageIcon English
  • pdpQsnIcon100 Questions
  • pdpsheetsIcon100 Marks
  • timerIcon90 Mins
languageIcon English
Free
Must Attempt

General Science Section Test 01

languageIcon English
  • pdpQsnIcon40 Questions
  • pdpsheetsIcon40 Marks
  • timerIcon20 Mins
languageIcon English
Free
Must Attempt

RRB ALP CBT-I Mock 1

languageIcon English
  • pdpQsnIcon75 Questions
  • pdpsheetsIcon75 Marks
  • timerIcon60 Mins
languageIcon English