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📚 Statistics with Technology 2e
Chapters ▾
1 Statistical Basics2 Graphical Descriptions of Data3 Examining the Evidence Using Graphs and Statistics4 Probability5 Discrete Probability Distributions6 Continuous Probability Distributions7 One-Sample Inference8 Estimation9 Two-Sample Inference10 Regression and Correlation11 Chi-Square and ANOVA Tests12 Appendix: Critical Value Tables
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12.2 Normal Critical Values for Confidence Levels

Table A.1: Normal Critical Values for Confidence Levels
Confidence Level, CCritical Value, Zc
99%2.575
98%2.33
95%1.96
90%1.645
80%1.28

Critical values for Zc created using Microsoft Excel