Question

J. Engle et al. explored wheat’s resistance to a disease that causes leaf-spotting, shriveling, and reduced yield in the article “Reaction of Commercial Soft RedWinter Wheat Cultivars to Stagonospora nodorum in the Greenhouse and Field” (Plant Disease, An International Journal of Applied Plant Pathology, Vol. 90, No. 5, pp. 576–582). Fields of soft red winter wheat were subjected to the pathogen Stagonospora nodorum during the summers of 2000–2002. Afterward, the fields were rated on a scale of 0 (resistant to the disease) to 10 (susceptible to the disease). The following table gives the rankings of the fields tested during the three summers.
At the 5% significance level, do the data provide sufficient evidence to conclude that a difference exists in mean resistance to Stagonospora nodorum among the three years of wheat harvests? (T1 = 55, T2 = 84.2, T3 = 46, and _x2i = 1,108.48.
Apply Procedure to perform a one-way ANOVA test by using either the critical-value approach or the P-value approach.


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  • CreatedAugust 13, 2015
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