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Critical Values for CI

# Critical Values for CI - 2.110 2.898 18 1.330 1.734 2.101...

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Table 1: Critical Values of the Standard Normal Z-Distribution P( |Z| < critical value) = level of confidence for the two sided confidence interval Level of Confidence 0.75 0.80 0.85 0.90 0.92 0.95 0.98 0.99 Critical Value 1.15 1.28 1.44 1.645 1.75 1.96 2.33 2.58 Table 2: Critical Values of Student’s t-Distribution P( |t| < critical value) = level of confidence for the two sided confidence interval Degree of Freedom Level of Confidence 0.80 = 80% 0.90 = 90% 0.95 = 95% 0.99 = 99% Critical Value 6 1.440 1.943 2.447 3.707 7 1.415 1.895 2.365 3.499 8 1.397 1.860 2.306 3.355 9 1.383 1.833 2.262 3.250 10 1.372 1.812 2.228 3.169 11 1.363 1.796 2.201 3.106 12 1.356 1.782 2.179 3.055 13 1.350 1.771 2.160 3.012 14 1.345 1.761 2.145 2.977 15 1.341 1.753 2.131 2.947 16 1.337 1.746 2.120 2.921 17 1.333 1.740
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Unformatted text preview: 2.110 2.898 18 1.330 1.734 2.101 2.878 19 1.328 1.729 2.093 2.861 20 1.325 1.725 2.086 2.845 21 1.323 1.721 2.080 2.831 22 1.321 1.717 2.074 2.819 23 1.319 1.714 2.069 2.807 24 1.318 1.711 2.064 2.797 25 1.316 1.708 2.060 2.787 26 1.315 1.706 2.056 2.779 27 1.314 1.703 2.052 2.771 28 1.313 1.701 2.048 2.763 29 1.311 1.699 2.045 2.756 30 1.310 1.697 2.042 2.750 32 1.309 1.694 2.037 2.738 34 1.307 1.691 2.032 2.728 36 1.306 1.688 2.028 2.719 38 1.304 1.686 2.024 2.712 40 1.303 1.684 2.021 2.704 45 1.301 1.679 2.014 2.690 50 1.299 1.676 2.009 2.678 70 1.294 1.667 1.994 2.648 100 1.290 1.660 1.984 2.626 ∞ 1.280 1.645 1.960 2.580...
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