Question: Consider the data from Exercise 6.3.11. If the sample size is small, as it is in this case, then in order for a confidence interval

Consider the data from Exercise 6.3.11. If the sample size is small, as it is in this case, then in order for a confidence interval based on Student's t to be valid, the data must come from a normally distributed population. Is it reasonable to think that difference in HBE level is normally distributed? How do you know?
Data From Exercise 6.3.11

20 18 28 0 7 34 16-5841 24 Lew-May 22 29 9 9 26 36 38 33 14 ry 6 42 47 37 9 33 54 41 18 elq -lea SD 23456790 1

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