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MB0040 Set2 : Q1. What do you mean by Statistical Survey? Differentiate between “Questionnaire” and “Schedule”.

Answer: A search for knowledge by analysing numerical data is known as Statistical Survey or Statistical Investigation.

A Statistical survey is a scientific process of collection and analysis of numerical data. Statistical surveys are used to collect numerical information about units in a population. Surveys involve asking questions to individuals Surveys of human populations are common in government, health, social science and marketing sectors.

Statistical surveys are categorised into two stages – planning and execution. The figure 2.1 shows the two broad stages of Statistical survey
Planning a Statistical Survey:

The relevance and accuracy of data obtained in a survey depends upon the care exercised in planning. A properly planned investigation can lead to best results with least cost and time.
Execution of Statistical survey:

Control methods should be adopted at every stage of carrying out the investigation to check the accuracy, coverage, methods of measurements, analysis and interpretation.

The collected data should be edited, classified, tabulated and presented in diagrams and graphs. The data should be carefully and systematically analysed and interpreted.

Difference between a schedule and a questionnaire

There is a difference between a schedule and a questionnaire. A schedule is a form that the investigator fills himself through surveying the units or individuals. A questionnaire is a form sent (usually mailed) by an investigator to respondents. The respondent has to fill it and then send it back to the investigator.

Questionnaires

Often, information is collected through questionnaires. The questionnaires are filled with questions pertaining to the investigation. They are sent to the respondents with a covering letter soliciting cooperation from the respondents (respondents are the people who respond to questions in the questionnaire). The respondents are asked to give correct information and to mail the questionnaire back. The objectives of investigation are explained in the covering letter together with assurance for keeping information provided by the respondents as confidential.

Good questionnaire construction is an important contributing factor to the success of a survey. When questionnaires are properly framed and constructed, they become important tools by which statements can be made about specific people or entire populations.

This method is generally adopted by research workers and other official and non-official agencies. This method is used to cover large areas of investigation. It is more economical and free from investigator’s bias. However, it results in many “non-response” situations. The respondent may be illiterate. The respondent may also provide wrong information due to wrong interpretation of questions.

Schedule Filled By Investigators

Information can be collected through schedules filled by investigators through personal contact. In order to get reliable information, the investigator should be well trained, tactful, unbiased and hard working.

A schedule is suitable for an extensive area of investigation through investigator’s personal contact. The problem of non-response is minimised.

There is a difference between a schedule and a questionnaire. A schedule is a form that the investigator fills himself through surveying the units or individuals. A questionnaire is a form sent (usually mailed) by an investigator to respondents. The respondent has to fill it and then send it back to the investigator.

1 comment:

  1. Give a brief note of the measures of central tendency together with their merits & Demerits. Which is the best measure of central tendency and why?

    ReplyDelete

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