Question: For a randomized block design with b blocks, the estimated standard error of the estimated difference between any two treatment means is 2/b. Use this

For a randomized block design with b blocks, the estimated standard error of the estimated difference between any two treatment means is √2/b. Use this formula to determine the number of blocks required to estimate (μ_A - μ_B), the difference between two treatment means, to within 10 units using a 95% confidence interval. Assume s ≈ 15.

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