One-way analysis of variance requires the assumption that the populations are approximately normal. However, if the sample sizes are large (n > 30), this assumption is not so important. Why is this so?
Answer to relevant QuestionsFluoride and tooth decay: Researchers examine the association between the fluoridation of water and the prevention of tooth decay by comparing the prevalence of tooth decay in countries that have fluoridated water with the ...Royalty and presidents: For the data in Exercises 8 and 10: a. Construct a back- to- back stem- and- leaf plot. b. Construct a back- to- back stem- and- leaf plot with split stems. c. Which plot do you think is more ...Why are the main effects misleading when interactions are present? Compare the ANOVA table in Exercise 3 with the ANOVA table in Exercise 1. Would you recommend leaving the balance powered up continuously? Explain your reasoning. The Number of days spent in the hospital was determined for 12 patients who underwent coronary bypass surgery. Can you concluded that the median is less than 5 days? Use the a = 0.01 level of significance.
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