Question 860368
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Hi,
CI      z-value
90%	z =1.645
92%	z = 1.751
95%	z = 1.96
98%	z = 2.326
99%	z = 2.576
p = 10/4000 = .0025, q = .0075
ME = 1.645{{{sqrt((.0025*.0075)/4000)}}}
CI: 10-ME < u <  10 + ME