Reading levels vary between different magazines. To avoid difficulties caused by different typefaces and sizes, an investigator just counted the number of letters and punctuation signs. Random samples of 20 sentences were selected from The New Yorker, Sports Illustrated, and National Geographic. The resulting summary statistics are:

Present the ANOVA table for these data.

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The New Yorker y₁ = 94.4 S₁= 58.4 n₁ = 20 where s Sports Illustrated V₂ = 92.9 S₂ = 54.2 22₂ = 20 = n₂ Σ (Vij j=1 - National Geographic Y3 = 75.5 $3= 38.1 n3 = 20 3)² / (n − 1) -