The results of a study on the effectiveness of line drying on the smoothness of fabric were summarized in the article "Line-Dried vs. Machine-Dried Fabrics: Comparison of Appearance, Hand, and Consumer Acceptance" (Home Econ. Research J., 1984: 27-35). Smoothness scores were given for nine different types of fabric and five different drying methods: (1) machine dry, (2) line dry, (3) line dry followed by 15-min tumble, (4) line dry with softener, and (5) line dry with air movement. Regarding the different types of fabric as blocks, construct an ANOVA table. Using a .05 significance level, test to see whether there is a difference in the true mean smoothness score for the drying methods.

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Drying Method Crepe Twill Fabric Terry 3.3 2.5 2.8 2.51.9 Double knit 3.6 2.0 3.6 24 2.3 4.2 3.4 3.8 3.1 3.1 Twill mix 34 2.4 2.91.6 1.7 3.8 1.3 2.8 2.01.6 Broadcloth 2.2 1.5 2.71.5 1.9 3.5 2.1 28 2.1 2.2 Corduroy 3.6 13 28 .71.8 2.6 1.4 2.4 13 1.6 Sheeting Denim