Page 54 - DCOM203_DMGT204_QUANTITATIVE_TECHNIQUES_I

Unit 3: Tabulation

Notes

Tasks

1. Prepare a blank table to represent the students of a college according to:
(a) Percentage of marks obtained in an annual examination by taking class
intervals 0 - 10, 10 - 20, ....., etc.

(b) Sex-wise: males and females.
(c) Faculty-wise: science, arts and commerce
2. Construct a blank table to represent two different dates and in five industries, the
average wages of the four groups, males, females, eighteen years and over and
under eighteen years. Suggest a suitable title.

!

Caution Analyze the field of investigation very carefully; only after decide for selecting
manual or mechanical method of tabulation.

Notes Statistical Investigation
The search for knowledge, done by analysing numerical facts, is known as a statistical
investigation.
A statistical investigation is a process of collection and analysis of data. The relevance and
accuracy of data obtained in an investigation depends directly upon the care with which it
is planned. A properly planned investigation can give the best results with least cost and
time. The investigation of the levels of living of the inhabitants of a particular area, the
investigation of relationship between rainfall and the yield of a crop, etc., are some examples
of statistical investigation.
A statistical investigation can be done by collecting numeral facts or data through the
conduct of statistical surveys. The collected data are then analysed to get the results. Any
process of statistical investigation can be divided into the following two broad categories:
1. Planning of a Statistical Investigation
2. Execution of a Statistical Investigation

Self Assessment

Multiple Choice Questions
19. When field of investigation is not too large and the number of characteristics are few then
we use ..................... method of investigation.

(a) Manual (b) Semi manual
(c) Mechanical (d) Automatic
20. ............................ method is used when the data are very large.
(a) Manual (b) Semi manual
(c) Mechanical (d) Automatic

LOVELY PROFESSIONAL UNIVERSITY 49