Contents

## SOLVED ASSIGNMENT 2020-2021

Course Code : ECO-07
Course Title : ELEMENTS OF STATISTICS
Assignment Code : ECO-07/TMA/2020-21
Coverage : ALL BLOCKS

Title Name

#### ECO-07 Solved Assignment 2020-2021

University IGNOU
Service Type Solved Assignment (Soft copy/PDF)
Course BCOM
Language ENGLISH
Semester 2020-21 Course: BCOM
Session 2020-2021
Short Name ECO-07 (ENGLISH)
Assignment Code ECO-07/TMA/2020-21
Product Assignment of BCOM 2020-2021 (IGNOU)
Submission Date You have to submit the assignment of all the courses to The Coordinator of your Study Centre. For
appearing in June Term-End Examination, you must submit assignment to the Coordinator of your study
centre latest by 15th March. Similarly for appearing in December Term-End Examination, you must
submit assignments to the Coordinator of your study centre latest by 15th September.

Q.1 Compare between mean, median and mode to point out their merits and
limitations.
(20)
Q.2 Differentiate between dispersion and skewness. If Karl Personsâ€™s coefficient
of skewness (SKp) = 0.06; mean = 150; variance of distribution= 2500 Find:
median; mode & coefficient of variation.
(20)
Q.3 a) Discuss the usefulness of statistics and explain the limitations of
statistics.
(10)
b) What is tabulation? Differentiate between classification and tabulation ? (10)
Q.4 a) Calculate the quartiles Q1 and Q3 for wages of the labours given below:
Wages 30-32 32-34 34-36 36-38 38-40 40-42 42-44
Labourers 12 18 16 14 12 8 6
(10)
b) The consumption of number of guava and orange on a particular week
by a family are given below:
Number of
Guavas
3 5 6 4 3 5 4
Number of
Oranges
1 3 7 9 2 6 2
Which fruit is consistently consumed by the family?
(10)
Q.5 Write short notes on the following:
a) Law of statistical regularity
b) Non sampling errors
c) Factors Affecting Choice of Data
d) Lorenz Curve