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Exercise 8 # starter iris_add = 1m(Sepal. Length ~ Petal. Length + Species, data = iris) Continue to use the model from Exercise 7. Create
Exercise 8 # starter iris_add = 1m(Sepal. Length ~ Petal. Length + Species, data = iris) Continue to use the model from Exercise 7. Create a 90% confidence interval for the difference in mean sepal length between virginicas and setosas for a given petal length. Report the lower bound of this interval
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