Question 860960
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Hi,
ME = {{{1.2816(.20/sqrt(12))}}}= .07 (2 decimal points
CI: &#956;-ME < u <  &#956; + ME
CI: 3.15g-ME < u <  3.15g + ME
CI: 3.08g < u < 3.22g
CI	z -value
80%     z= 1.2816
90%	z =1.645
92%	z = 1.751
95%	z = 1.96
98%	z = 2.326
99%	z = 2.576