The following set of masses (mg) was obtained:
20.7; 21.4 ; 23.0 ; 20.6 ; 21.9 ; 20.2
1. Make a decision when the most suspect results can be discarded.
2. Determine the mean, relative standard deviation and the standard deviation (SD) in % of the individual result.
3. Show and determine the standard deviation (SD) of the mean.
4. Determine the confidence interval at 95%.