Refer to the study described in Exercise 14.11. Suppose a new study is to be designed in which only three levels of milk fat and three levels of air will be used. Determine the number of replications needed to obtain an α = .05 test having a power of at least 90% that detects a difference of 5 in any pair of treatment means. Use the data from Exercise 14.11 to estimate the value of σ2e.
Answer to relevant QuestionsRefer to Exercise 14.1. The researchers decide to use the following model, which relates the response variable y to the four instructional conditions. y = μ + τi + ɛij for i = 1, 2, 3, 4 and j = 1, 2, 3, 4, 5 a. Write an ...Refer to Exercise 14.23. a. Test for interactions and main effects. Use α = .05. b. What can you conclude about the effects of pH and calcium on increases in mean trunk diameter for orange trees? In exercise Refer to Exercise 14.29. a. How would you design an experiment to investigate the effects of age, gender, and excess weight on fatigue time? b. Suppose the physician wanted to investigate the relationship among the ...The following experiment is from Kuehl (2000). Sludge is a dried product remaining from processed sewage; it contains nutrients beneficial to plant growth. It can be used for fertilizer on agricultural crops provided it does ...A horticulturist is designing a study to investigate the effectiveness of five methods for the irrigation of blueberry shrubs. The methods are surface, trickle, center pivot, lateral move, and subirrigation. There are 10 ...
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