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Nested Designs

Nested Designs. Mean Water Levels in Florida Swamps K.C. Ewel and L.P. Wickenheiser (1988). “Effect of Swamp Size on Growth Rates of Cypress (Taxodium distichum) Trees,” American Midland Naturalist , Vol.120,#2,pp.362-370. Data.

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Nested Designs

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  1. Nested Designs Mean Water Levels in Florida Swamps K.C. Ewel and L.P. Wickenheiser (1988). “Effect of Swamp Size on Growth Rates of Cypress (Taxodium distichum) Trees,” American Midland Naturalist, Vol.120,#2,pp.362-370.

  2. Data • Florida Swamps Classified in 3 Size Categories: Small, Medium, Large (Fixed Factor) • 3 Swamps sampled from each size type (Random Factor) • 27 locations sampled and water levels measured, in cm. • Yijk represents the water level for the kth location of the jth swamp within the ith size level Mean (SD) for the 27 locations for the 9 Swamps (Approximated from paper)

  3. Statistical Model

  4. Sums of Squares SSA SSB(A) SSE

  5. Analysis of Variance / F-tests

  6. Comparing Swamp Sizes / Variance Estimates

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