Question 1055491
ME ={{{ z*sigma/sqrt(n)}}}
check out z-values...
2.576 > 1.645
Multiplying by a greater z-value makes interval wider 
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 = CI	z = value
90%	z =1.645
92%	z = 1.751
95%	z = 1.96 ***
98%	z = 2.326
99%	z = 2.576 ****