Question: Consider the data from Exercise 6.7.11. Given that there are only a small number of observations in each group, the confidence interval calculated in Exercise

Consider the data from Exercise 6.7.11. Given that there are only a small number of observations in each group, the confidence interval calculated in Exercise 6.7.11 is only valid if the underlying populations are normally distributed. Is the normality condition reasonable Bere? Support your answer with appropriate graphs.
Data From Exercise 6.7.11

Decaf Calleine 28 26 -2 14 36 38 112 п1 SE 3,7 3.4

Decaf Calleine 28 26 -2 14 36 38 112 1 SE 3,7 3.4

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