Interpret Data: Identify Variation in Data Collection Methods (Measurement) . In arithmetic, answers can be calculated exactly. Collecting data using measurement will always have potential for the data to be inaccurate simply because of the act of measuring. No matter what level of care is taken with measurements, the data can always be more accurate. . For example, heights taken in metres can be more accurate if measured in smaller units like centimetres or millimetres. Activities tend to provi