# Exercise scaffold. Reference implementation is in a separate directory."""G16: reproducible measurement records, not a universal performance conclusion."""importhashlibimportjsonimportmathimportplatformimportrandomimportstatisticsimportsysimporttimedefdigest(path):raiseNotImplementedError('Implement this contract from the book.')defpaired_trials(old,new,workload,repeats=7):raiseNotImplementedError('Implement this contract from the book.')defmanual_sum(data):raiseNotImplementedError('Implement this contract from the book.')