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Describe the effect of the quality of the data source on the information produced.

Describe the effect of the quality of the data source on the information produced. J.D. Duddy. Indirect Entry. Taking data from a piece of paper and typing it into a database is an example of data being entered indirectly. Indirect entry is more likely to lead to mistakes, due to a human error.

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Describe the effect of the quality of the data source on the information produced.

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  1. Describe the effect of the quality of the data source on the information produced. J.D. Duddy

  2. Indirect Entry • Taking data from a piece of paper and typing it into a database is an example of data being entered indirectly. Indirect entry is more likely to lead to mistakes, due to a human error.

  3. Example of Indirect Entry • A computer system is used to record the temperature everyday at 12 noon. • One way of doing this would be for the operator to go out and read a thermometer at the set time. They then go back to the computer and type in the temperature. This is indirect data capture. • Another way of doing this would be to use a temperature sensor and program the computer to read the temperature at the right time. This is direct data capture.

  4. Why Things Go Wrong • If data is entered incorrectly, for whatever reason, the information output will be incorrect. Information is only as accurate as the data that was entered. If the data source is wrong, the data output will be wrong. This is sometimes referred to as GIGO – Garbage In Garbage Out.

  5. Example of GIGO – Garbage In Garbage Out • Garbage In When entering the marks that a student gained in the different question of an exam, the teacher copies in the marks for the student above him in the list. • Garbage Out The student is awarded a B grade, instead of a D in the exam.

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