Three different washing solutions are being compared to study their effectiveness in retarding bacteria growth in five-gallon milk containers.The analysis is done in a laboratory, and only three trials can be run on any day.Because days could represent a potential source of variability, the experimenter decides to use a randomized block design.Observations are taken for four days, and the data, and analysis output are shown here.

\fAnalysis of Variance Source DF Adj SSAdj MS F-ValueP-Value solution-factor 703.50 351.750 40.72 0.0003 days-block 3 1106.92 368.972 42.71 0.000 Error 51.83 8.639 Total 11 1862.25 0