z Confidence intervals for the Mean

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Questions

• How do you find the z score of a percentile?
• What is the Z score for 95%?
• What is the z value for a 90, 95, and 99 percent confidence interval?
• 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 by 8 points?
• How do you find the z-score that has 93.82% of the distribution's area to its left?
• Question #d4c02