ECO-7 EM 2025 SOLVED ASSIGNMENT

Description

TUTOR MARKED ASSIGNMENT
Course Code : ECO-07
Course Title : ELEMENTS OF STATISTICS
Assignment Code : ECO-07/TMA/2025
Coverage : ALL BLOCKS
Maximum Marks: 100
Attempt all the questions:
Q.1 Differentiate between the primary and secondary data. Explain different
methods of collecting primary data and the sources of secondary data.
(20)
Q.2 a) Calculate the Arithmetic Mean from the following data:
Total Sales
(in thousands)
Number of
Salespersons
0 – 5 3
5 – 10 12
10 – 25 25
25 – 50 10

b) Draw a histogram and a frequency polygon from the following data:
Classes f
10 – 20 10
20 – 30 20
30 – 40 30
40 – 50 25
50 – 60 10

(10+10)
Q.3 a) Compute Karl Pearson’s coefficient of skewness from the following data:

Classes Frequency
30—33 2
33—36 4
36—39 26
39—42 47
42—45 15
45—48 6

Additional information :
i. Arithmetic mean is 40.11.
ii. Standard deviation is 2.96.
iii. Model class is 39–42.

b) Explain convenience and judgement sampling methods in brief.
(10+10)
Q.4 a) Describe the importance of visual presentation of data.
b) Discuss the importance of Statistics in Business.
(10+10)
Q.5
Write short notes on the following:
(5×4=20)
a) Statistical survey
b) Application of Ratios
c) Geometric Mean
d) Variance