The two tailed critical value is ±1.55
It depends on whether the interval is one sided or two sided. The critical value for a 2-sided interval is 1.75
The Z-value for a one-sided 91% confidence interval is 1.34
1.96
1.15
Pr{z<=1.0805}~=0.86
It depends on whether the interval is one sided or two sided. The critical value for a 2-sided interval is 1.75
1.96
The Z-value for a one-sided 91% confidence interval is 1.34
For a two-tailed interval, they are -1.645 to 1.645
1.96
ss
1.15
Pr{z<=1.0805}~=0.86
1.75
1.31
2.326 (one sided) or 2.578 (two sided)
The answer will depend on whether the interval is one-sided or two-sided; and if two-sided, whether it is symmetrical.For a symmetrical two-sided confidence interval, the Z value is 0.974114The answer will depend on whether the interval is one-sided or two-sided; and if two-sided, whether it is symmetrical.For a symmetrical two-sided confidence interval, the Z value is 0.974114The answer will depend on whether the interval is one-sided or two-sided; and if two-sided, whether it is symmetrical.For a symmetrical two-sided confidence interval, the Z value is 0.974114The answer will depend on whether the interval is one-sided or two-sided; and if two-sided, whether it is symmetrical.For a symmetrical two-sided confidence interval, the Z value is 0.974114