1. Calibration error: The weighing balance may not have been calibrated properly when it was purchased from the supplier.
2. Human error: Paul could have made errors in his measurements due to carelessness or lack of attention to detail.
3. Instrument error: The weighing balance may not have been functioning properly, causing incorrect measurements.
4. Environmental conditions: External factors such as temperature and humidity can affect the weighing balance and measurements.
5. Measurement technique: Paul may not have used the correct measuring techniques, leading to inaccurate results.
6. Recording error: Paul may have recorded the wrong values due to errors in writing or data entry.
7. Intentional error: Paul may have intentionally altered the measurements to meet certain specifications or requirements.
Paul was asked to confirm that the amount of sodium chloride supplied by ITC pharmacy was 20 g. The measurement he obtained on Monday, day one was 18.99 g. The weighing balance had just been bought from the ITEMBUA supplier and had not been calibrated. The next day the measurement he obtained was 19.80 g. Paul had to travel to East London on day three but he decided to quickly take the measurement again but got distracted and wrote 20.10 g. What are the potential sources of Paul’s error?
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