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Data Collection Sheet

Asked by slayer87 | Oct 22, 2004 | A Level > Maths > Homework
slayer87
Can you tell me the advantages and disadvantages of Data Collection sheets? Thanks alot, Christine.

SZPoints: 3 | Difficulty: Average | Comments: 3 | Answered (goto answer)

2 Comments, 1 Answer

syrup, 22 Oct, 2004 @ 14:06
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syrup
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Hi there Christine. I'll assume that by Data Collection you mean a questionnaire type sheet. The advantage of these are:- They are relatively easy to analyse They are familiar to the public A large sample respobse can be obtained at a relatively low cost In theory they are quick and easy for the respondent to complete They can be used to ask sensitive questions

The Disadvantages:- If you forget something you cannot usally go back especially if the data collection is anonymous You will never recieve 100 % back There is a danger of questionnaire fatigue Respondents may misunderstand questions Those who have an interest in the subject may be more likely to respond skewing the sample.

Hope this helps.

BigDave, 22 Oct, 2004 @ 21:32
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BigDave
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this shud help u, disadvantages of questionnaires: Questionnaires, like many evaluation methods occur after the event, so participants may forget important issues. Questionnaires are standardised so it is not possible to explain any points in the questions that participants might misinterpret. This could be partially solved by piloting the questions on a small group of students or at least friends and colleagues. It is advisable to do this anyway. Open-ended questions can generate large amounts of data that can take a long time to process and analyse. One way of limiting this would be to limit the space available to students so their responses are concise or to sample the students and survey only a portion of them. Respondents may answer superficially especially if the questionnaire takes a long time to complete. The common mistake of asking too many questions should be avoided. Students may not be willing to answer the questions. They might not wish to reveal the information or they might think that they will not benefit from responding perhaps even be penalised by giving their real opinion. Students should be told why the information is being collected and how the results will be beneficial. They should be asked to reply honestly and told that if their response is negative this is just as useful as a more positive opinion. If possible the questionnaire should be anonymous.

Some advantages of questionnaires: The responses are gathered in a standardised way, so questionnaires are more objective, certainly more so than interviews. Generally it is relatively quick to collect information using a questionnaire. However in some situations they can take a long time not only to design but also to apply and analyse (see disadvantages for more information). Potentially information can be collected from a large portion of a group. This potential is not often realised, as returns from questionnaires are usually low. However return rates can be dramatically improved if the questionnaire is delivered and responded to in class time. Hope this helps, Dave :)

enni2, 24 Oct, 2004 @ 15:37
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enni2
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Funny question, data collection sheets allow you to collect information and thus be able to compare, analyse, evaluate them and come to a conclusion. Well i studied AS Statistics last year, so I hope this what you were asking:

Census (every member of population are asked) AD - Accuracy DIS - Time and Cost

Sampling AD - Speed and Cost DIS - Loss of Accuracy

Modelling (involves either Normal Distribution or uniform Distribution) AD - Cost and Way of predicting DIS - Loss of Accuracy

Median AD - Excludes extreme values DIS - Does not inclue all data

Mean AD - Includes all data, Used in tests DIS - Includes outliers

IQR AD - Only looks at middle 50% of results

:)

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