Three different washing solutions are being compared to study their effectiveness in retarding bacteria growth in 5-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 are shown here.

Analyze the data from this experiment (use ???? = 0.05) and draw conclusions.

Days Solution 1 2 3 4 1 13 22 18 39 2 16 24 17 44 3 5 4 1 22