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29 Απρ 2022 · Find the critical value of t in the two-tailed t table. Multiply the critical value of t by s / √ n . Add this value to the mean to calculate the upper limit of the confidence interval, and subtract this value from the mean to calculate the lower limit.
This t-distribution table provides the critical t-values for both one-tailed and two-tailed t-tests, and confidence intervals. Learn how to use this t-table with the information, examples, and illustrations below the table.
Critical values of t for two-tailed tests Significance level (a) Degrees of freedom 20 22 23 24 29 30 40 50 60 70 80 100 1000 Infinite 0.2 3.078
3 0.277 0.584 0.765 0.978 1.250 1.638 2.353 3.182 3.482 4.541 5.841 7.453 10.215 4 0.271 0.569 0.741 0.941 1.190 1.533 2.132 2.776 2.999 3.747 4.604 5.598 7.173 5 0.267 0.559 0.727 0.920 1.156 1.476 2.015 2.571 2.757 3.365 4.032 4.773 5.893 6 0.265 0.553 0.718 0.906 1.134 1.440 1.943 2.447 2.612 3.143 3.707 4.317 5.208
0 t critical value-t critical value t curve Central area t critical values Confidence area captured: 0.90 0.95 0.98 0.99 Confidence level: 90% 95% 98% 99% 1 6.31 12.71 31.82 63.66 2 2.92 4.30 6.97 9.93 3 2.35 3.18 4.54 5.84 4 2.13 2.78 3.75 4.60 5 2.02 2.57 3.37 4.03 6 1.94 2.45 3.14 3.71 7 1.90 2.37 3.00 3.50
14 Ιουλ 2007 · t Table cum. prob t.50 t.75 t.80 t.85 t.90 t.95 t.975 t.99 t.995 t.999 t.9995 one-tail 0.50 0.25 0.20 0.15 0.10 0.05 0.025 0.01 0.005 0.001 0.0005 two-tails 1.00 0.50 0.40 0.30 0.20 0.10 0.05 0.02 0.01 0.002 0.001 df 1 0.000 1.000 1.376 1.963 3.078 6.314 12.71 31.82 63.66 318.31 636.62 2 0.000 0.816 1.061 1.386 1.886 2.920 4.303 6.965 9.925 22.327 31.599
Tables T-11 Probability p t* Table entry for p and C is the critical value t* with probability p lying to its right and probability C lying between 2t* and t*. Upper-tail probability p df .25 .20 .15 .10 .05 .025 .02 .01 .005 .0025 .001 .0005 ... TABLE D t Distribution Critical Values. Title: tables.pdf
