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Hi,
33 adult men had a mean weight of 182.5 pounds and a standard deviation of
22.5 pounds
ME = 2.576*22.5/sqrt(33) = 10.1
CI: 182.5-10.1 < u <182.5 +10.1
CI: 172.4 < u <192.6
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a a/2 crtical regions
80% 0.2 10% z <-1.28155 z >+1.28155
90% 0.1 5% z <-1.645 z >+1.645
92% 0.8 4% z <-1.751 z >+1.751
95% 0.05 2.50% z <-1.96 z >+1.96
98% 0.02 1% z <-2.33 z >+2.33
99% 0.01 0.50% z<-2.576 z >+2.576
