(c) Rashid carried out pyrolysis of sawdust in a semi-batch reactor and obtained replicates of measurement under the same conditions in order to test the precision of the method. The recorded values...

(c) Rashid carried out pyrolysis of sawdust in a semi-batch reactor and obtained replicates of measurement under the same conditions in order to test the precision of the method. The recorded values for biochar are 22.23, 22.18, 22.25, 22.09, and 22.17 wt%. Using a suitable test, analyze whether the value of 22.09 wt% is a valid measurement at a 95% confidence level?