# Question: In order for the conclusions reached in Exercise 14 5 to

In order for the conclusions reached in Exercise 14.5 to be valid, the conditions of normality, equal variance, and independence must be satisfied. Use the residuals from the fitted model to assess the three conditions. Refer to the discussion in Section 8.4.

a. Is there significant evidence of a violation of the normality condition?

b. Is there significant evidence that the variances in reasoning scores were different for the three methods and the control?

c. What is the justification for concluding that the 100 reasoning scores are independent?

d. If the condition of normality and/ or equal variance is violated, what are some alter-native methods of analysis?

a. Is there significant evidence of a violation of the normality condition?

b. Is there significant evidence that the variances in reasoning scores were different for the three methods and the control?

c. What is the justification for concluding that the 100 reasoning scores are independent?

d. If the condition of normality and/ or equal variance is violated, what are some alter-native methods of analysis?

**View Solution:**## Answer to relevant Questions

Refer to Exercise 14.5. When the normality condition is violated, an alternative to the F test is the Kruskal– Wallis test (see Section 8.6). a. Test for differences in the median outputs of the four incentive plans. Use ...Refer to Exercise 15.10. a. Do the model conditions appear to be satisfied for this set of data? Explain. b. If the model conditions appear to be violated, suggest an alternative method of analysis. In exercise Refer to Exercise 15.16. a. Which pairs of varieties appear to have significantly different mean yields at the α = .05 level? b. Which pairs of planting densities appear to have significantly different mean yields at the α ...Refer to Exercise 15.24. Based on the residuals from the fitted model, do the model conditions appear to be satisfied? Three dye formulas for a certain synthetic fiber are under consideration by a textile manufacturer who wishes to know whether the three are in fact different in quality. To aid in this decision, the manufacturer conducts ...Post your question