Question 851716
<pre><font face = "Tohoma" size = 3 color = "indigo"> 
Hi,
0.01 level of significance z = ± 2.576
80%	z = 1.28155
90%	z =1.645
92%	z = 1.751
95%	z = 1.96
98%	z = 2.326
99%	z = 2.576
 z = (23.9-25.3)/.639 = -2.1909 , within the confidence interval