You are filling in the ANOVA table values for an experiment using a randomized complete block design.In the experiment, there are 2 treatment groups, 20 blocks.The treatments F value (Fstat) turns out to be 3.662.In finding the critical F value to use in an "equal treatment means" hypothesis test here, you should use df1 = 1 and df2 = 19.

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In a randomized complete block design, the degrees of freedom for the treatments are equal to the number of treatments minus one, and the degrees of freedom for the blocks are equal to the number of blocks minus one. Therefore, in this experiment, df1 = 2 - 1 = 1 and df2 = 20 - 1 = 19.

You Are Filling in the ANOVA Table Values for an Experiment