Question 862643
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Hi
z = (51-50)/(3.6/sqrt(55)) = 2.06
CI	z -value
90%	z =1.645
92%	z = 1.751
95%	z = 1.96
98%	z = 2.326
99%	z = 2.576
 2.06 < 2.576  Do not reject Ho at the 1% level of significance