Question 633843
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
99% level of the confidence 

	a	a/2	crtical regions	
80%	0.2	10%	z <-1.282       z >+1.282
90%	0.1	5%	z <-1.645	          z >+1.645
92%	0.8	4%	z <-1.751	          z >+1.751
95%	0.05	2.50%	z <-1.96	          z >+1.96
98%	0.02	1%	z <-2.326	          z >+2.326
99%	0.01	0.50%	z<-2.576	          z >+2.576