Question 864697
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Hi
ME = 2.576*15/sqrt(200) = 2.73
CI: 102-2.73 < u <  102 + 2.73
B. 102 ;(97.27 ; 102.73)

ME = 1.645*15/sqrt(200) = 1.74
CI: 102-1.74 < u <  102 + 1.74
B. 102 ; (100.26 ; 103.74)

CI	z
90%	z =1.645
92%	z = 1.751
95%	z = 1.96
98%	z = 2.326
99%	z = 2.576