Finding z, Use Table A or technology to find the critical value z* for a 93% confidence interval.

Question

 Finding z* Use Table A or technology to find the critical value z* for a 93% confidence interval. Assume that the Large Counts condition is met.

[a] 2.282

[b] 1.812

[c] 0.812

[d] none of the above

Answer 1

CI is two sided so will have 3.5% on each end, so need to look up z score for 96.5%, which is z score for 0.965 probability = 1.812 (b).