Question 1175012
95% half-interval is z*sigma/sqrt(n)=1.96*2.8/sqrt(29)=1.02 books
95% CI is (32.98, 35.02)  oz
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the half-interval is z*17/sqrt(28) where z=1.645, so it is 5.28
using the mean from the first part (not clear)
(28.7, 39.3) oz