What is the z value for a 90, 95, and 99 percent confidence interval? Statistics Inference with the z and t Distributions z Confidence intervals for the Mean 1 Answer VSH Dec 3, 2017 Attached Explanation: Answer link Related questions How do you find the z score of a percentile? What is the Z score for 95%? In the Z-score formula, can the standard error measurement be used instead of standard deviation? What is 'z' if the confidence interval is 89%? What is 'z' if the confidence interval is 80%? A distribution has a standard deviation of #sigma=8#. How do you find the z-score below the mean... How do you find the z-score that has 93.82% of the distribution's area to its left? Question #d4c02 See all questions in z Confidence intervals for the Mean Impact of this question 229922 views around the world You can reuse this answer Creative Commons License