bus-stat-book1

Merits and demerits of secondary data 1 secondary

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Unformatted text preview: ain. Many government publications are relatively cheap and libraries stock quantities of secondary data produced by the government, by companies and other organisations. 2. Large quantities of secondary data can be got through internet. 3. Much of the secondary data available has been collected for many years and therefore it can be used to plot trends. 4. Secondary data is of value to: - The government – help in making decisions and planning future policy. - Business and industry – in areas such as marketing, and sales in order to appreciate the general economic and social conditions and to provide information on competitors. - Research organisations – by providing social, economical and industrial information. 37 3.4 Classification: The collected data, also known as raw data or ungrouped data are always in an un organised form and need to be organised and presented in meaningful and readily comprehensible form in order to facilitate further statistical analysis. It is, therefore, essential for an investigator to condense a mass of data into more and more comprehensible and assimilable form. The process of grouping into different classes or sub classes according to some characteristics is known as classification, tabulation is concerned with the systematic arrangement and presentation of classified data. Thus classification is the first step in tabulation. For Example, letters in the post office are classified according to their destinations viz., Delhi, Madurai, Bangalore, Mumbai etc., Objects of Classification: The following are main objectives of classifying the data: 1. It condenses the mass of data in an easily assimilable form. 2. It eliminates unnecessary details. 3. It facilitates comparison and highlights the significant aspect of data. 4. It enables one to get a mental picture of the information and helps in drawing inferences. 5. It helps in the statistical treatment of the information collected. Types of classification: Statistical data are classified in respe...
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This note was uploaded on 01/18/2014 for the course BUS 100 taught by Professor Moshiri during the Winter '08 term at UC Riverside.

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