NCERT Book Class 11 Economics (Statistics for Economics) Chapter 3 Organisation of Data

CHAPTER

Organisation of Data

census and sampling. In this chapter,
Studying this chapter should you will know how the data, that you
enable you to:
collected, are to be classified. The
• classify the data for further
purpose of classifying raw data is to
statistical analysis;
• distinguish between quantitative bring order in them so that they can be
and qualitative classification; subjected to further statistical analysis
• prepare a frequency distribution easily.
table; Have you ever observed your local
• know the technique of forming junk dealer or kabadiwallah to whom
classes; you sell old newspapers, broken
• be familiar with the method of tally household items, empty glass bottles,
marking; plastics, etc? He purchases these
• differentiate between univariate
things from you and sells them to those
and bivariate frequency
distributions.
who recycle them. But with so much
junk in his shop it would be very
difficult for him to manage his trade, if
1. INTRODUCTION he had not organised them properly.
In the previous chapter you have learnt To ease his situation he suitably
about how data is collected. You also groups or “classifies” various junk. He
came to know the difference between puts old newspapers together and