LIVE Course for free

Rated by 1 million+ students
Get app now
+1 vote
15.1k views
in Statistics by (62.8k points)

Find the mean:

Class interval: 10-30 30-50 50-70 70-90 90-110 110-130
Frequency: 5 8 12 20 3 2

1 Answer

+1 vote
by (30.7k points)
selected by
 
Best answer

Let’s consider the assumed mean (A) = 60

From the table it’s seen that,

A = 60 and h = 20

Mean = A + h x (\(\frac{Σf_i u_i}{N}\))

= 60 + 20 x (\(\frac{14}{50}\))

= 60 + \(\frac{28}{5}\)

= 60 + 5.6

= 65.6

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...