6P.8—Processing and analysing practical data

Convert raw readings into the correct derived quantity, keep units consistent and show enough working to audit the calculation. Then compare replicates, calculate a mean or rate where justified and interpret the pattern.

Convert capillary movement into oxygen volume per minute, or convert counts into percentage cover; do not compare raw numbers that use different scales or durations.

A calculated value is not automatically meaningful if the denominator, units or time interval differ.