The real value of a measurement, it is could be measured with no errors at all.
1. Measurements that give similar values when repeated. The replicates will therefore have a small range.
2. Data measured on sensitive equipment with a suitably fine scale.
Findings that can be repeated.
Measurements that are close to the true value
The best quality data. Data that is precise and reliable and obtained from an unbiased, controlled experiment. It is data which is considered to be accurate.
Any data or observations that are used to support a particular hypothesis.
Cannot be used as evidence. However, can be useful to suggest a testable hypothesis.