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Section 6 . 2 In Exercises 7 and 8 , find the critical value t c for the given confidence level c sample size n

Section 6.2
In Exercises 7 and 8, find the critical value tc for the given confidence level c sample size n.
7.c=0.80,n=8
t8082=28.29
8.c=0.80,n=22
t80222=17.45
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