Use analysis of variance for the indicated test. 14. Popular Tree Weights: Weigh
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Question
Use analysis of variance for the indicated test.
14. Popular Tree Weights: Weights (kg) of poplar trees were obtained from trees planted in a sandy and dry region. The trees were given different treatments identified in the table below. The data are from a study conducted by researchers at Pennsylvania State University ans were provided by Minitab, Inc. Use a 0.05 significance level to test the claim that the four treatment categories yield poplar trees with the same mean weight. Is there a treatment that appears to be most effective in the sandy and dry region?
No Treatment: 0.24, 1.69, 1.23, 0.99, 1.80
Fertilizer: 0.92, 0.07, 0.56, 1.74, 1.13
Irrigation: 0.96, 1.43, 1.26, 1.57, 0.72
Fertilizer and Irrigation: 1.07, 1.63, 1.39, 0.49, 0.95
Explanation / Answer
since F value is lower than critical value we fail to reject Ho
conclusion
there is no evidence to conclude that there is a difference between the treatments
no treatment 0.24 1.69 1.23 0.99 1.8 RESUMEN fertilizer 0.92 0.07 0.56 1.74 1.13 groups count sum average variance irrigation 0.96 1.43 1.26 1.57 0.72 no treatment 5 5.95 1.19 0.39155 fertilizer and irrigation 1.07 1.63 1.39 0.49 0.95 fertilizer 5 4.42 0.884 0.39053 irrigation 5 5.94 1.188 0.12017 fertilizer and irrigation 5 5.53 1.106 0.19008 ANOVA variations SS df MS F p value critica value between 0.3114 3 0.1038 0.38010491 0.7686639 3.23887152 error 4.36932 16 0.2730825 Total 4.68072 19Related Questions
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