Plugs not destroyed during testing must also be returned to MGRRE. Thin sections must also be returned along with any residual material from the sample. Provide all data or analytical results ...

Cumulative frequency – Intermediate & Higher tier - WJEC Averages and range - WJEC Range and box-and-whisker plots - WJEC Discussing results - WJEC Mean, median and mode ...

Data that is collected via post may be cheaper and quicker to collect, but many people may not post their questionnaires back so the sample size may be smaller. Questionnaires need to be easy to ...