Five treatments (Placebo, A, B, C) including a placebo were randomly assigned to
ID: 3218298 • Letter: F
Question
Five treatments (Placebo, A, B, C) including a placebo were randomly assigned to 28 patients. Data below give for each treatment the number of days (response variable y) for healing to be complete: 1. For completely randomized design one-way AOV, state the null and alternative hypotheses. 2. For the test of hypothesis in Question 1, calculate the test statistic F', the P-value, and make a decision about Ho based on a = 0.05. 3. Use the AOV results of Question 2. Use Notes 7 and 8 from Unit 2. a. Calculate the LSD and Tukey comparison criteria based on a = 0.05. | b. Use the criteria in part (a) to construct the 95% confidence intervals for all pairs, and indicate where the differences lie based upon the confidence intervals.Explanation / Answer
X1-X2=2.43
X1-X3=3
X1-X4=1.57
X2-X3=0.57
X2-X4=-0.86
X3-X4=-1.43
Critical range=Qa*MSW/2(1/nj+1/nj’)
Qa=3.90
3.90*1.95/2(1/7+1/7)
2.06
Critical range is greater than four of the differences. Hence, for X1-X2 and X1-X3, we can conclude that there is significant difference
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