TABLE B. 2 THE \( \boldsymbol{t} \) DISTRIBUTION Table entries are values of \( t \) corresponding to proportions in one tail or in two tails combined. Two talls combined \begin{tabular}{|c|c|c|c|c|c|c|} \hline & \multicolumn{6}{|c|}{ Proportion in One Tail } \\ \hline & 0.25 & 0.10 & 0.05 & 0.025 & 0.01 & 0.005 \\ \hline \multirow[b]{2}{*}{\( d f \)} & \multicolumn{5}{|c|}{ Proportion in Two Tails Combined } & \\ \hline & 0.50 & 0.20 & 0.10 & 0.05 & 0.02 & 0.01 \\ \hline 1 & 1.000 & 3.078 & 6.314 & 12.706 & 31.821 & 63.657 \\ \hline 2 & 0.816 & 1.886 & 2.920 & 4.303 & 6.965 & 9.925 \\ \hline 3 & 0.765 & 1.638 & 2.353 & 3.182 & 4.541 & 5.841 \\ \hline 4 & 0.741 & 1.533 & 2.132 & 2.776 & 3.747 & 4.604 \\ \hline 5 & 0.727 & 1.476 & 2.015 & 2.571 & 3.365 & 4.032 \\ \hline 6 & 0.718 & 1.440 & 1.943 & 2.447 & 3.143 & 3.707 \\ \hline 7 & 0.711 & 1.415 & 1.895 & 2.365 & 2.998 & 3.499 \\ \hline 8 & 0.706 & 1.397 & 1.860 & 2.306 & 2.896 & 3.355 \\ \hline 9 & 0.703 & 1.383 & 1.833 & 2.262 & 2.821 & 3.250 \\ \hline 10 & 0.700 & 1.372 & 1.812 & 2.228 & 2.764 & 3.169 \\ \hline 11 & 0.697 & 1.363 & 1.796 & 2.201 & 2.718 & 3.106 \\ \hline 12 & 0.695 & 1.356 & 1.782 & 2.179 & 2.681 & 3.055 \\ \hline 13 & 0.694 & 1.350 & 1.771 & 2.160 & 2.650 & 3.012 \\ \hline 14 & 0.692 & 1.345 & 1.761 & 2.145 & 2.624 & 2.977 \\ \hline 15 & 0.691 & 1.341 & 1.753 & 2.131 & 2.602 & 2.947 \\ \hline 16 & 0.690 & 1.337 & 1.746 & 2.120 & 2.583 & \begin{tabular}{l} 2.941 \\ 2.921 \end{tabular} \\ \hline 17 & 0.689 & 1.333 & 1.740 & 2.110 & 2.567 & 2.898 \\ \hline 18 & 0.688 & 1.330 & 1.734 & 2.101 & 2.552 & 2.878 \\ \hline 19 & 0.688 & 1.328 & 1.729 & 2.093 & 2.539 & 2.861 \\ \hline 20 & 0.687 & 1.325 & 1.725 & 2.086 & 2.528 & 2.845 \\ \hline 21 & 0.686 & 1.323 & 1.721 & 2.080 & \begin{tabular}{l} 2.520 \\ 2.518 \end{tabular} & 2.831 \\ \hline 22 & 0.686 & 1.321 & 1.717 & 2.074 & 2.508 & 2.819 \\ \hline 23 & 0.685 & 1.319 & 1.714 & 2.069 & 2.500 & 2.807 \\ \hline 24 & 0.685 & 1.318 & 1.711 & 2.064 & 2.492 & 2.797 \\ \hline 25 & 0.684 & 1.316 & 1.708 & 2.060 & 2.485 & 2.787 \\ \hline 26 & 0.684 & 1.315 & 1.706 & 2.056 & \begin{tabular}{l} 2.479 \\ 2.479 \end{tabular} & 2.779 \\ \hline 27 & 0.684 & 1.314 & 1.703 & 2.052 & 2.473 & 2.771 \\ \hline 28 & 0.683 & 1.313 & 1.701 & 2.048 & 2.467 & 2.763 \\ \hline 29 & 0.683 & 1.311 & 1.699 & 2.045 & 2.462 & 2.756 \\ \hline 30 & \begin{tabular}{l} 0.683 \\ \end{tabular} & 1.310 & 1.697 & 2.042 & \begin{tabular}{l} 2.457 \\ 2.457 \end{tabular} & 2.750 \\ \hline 40 & \begin{tabular}{l} 0.081 \\ 0.681 \end{tabular} & 1.303 & 1.684 & 2.021 & 2.423 & 2.704 \\ \hline 60 & 0.679 & 1.296 & 1.671 & 2.000 & 2.390 & 2.660 \\ \hline 120 & 0.677 & 1.289 & 1.658 & 1.980 & 2.358 & 2.617 \\ \hline\( \infty \) & 0.674 & 1.282 & 1.645 & 1.960 & 2.326 & 2.576 \\ \hline \end{tabular} Table III of R. A. Fisher and F. Yates, Statistical Tables for Biological, Agricultural and Medical Research, 6th ed. London: Longman Group Ltd., 1974 (previousty published by Oliver and Boyd Ltd., Edinburgh). Copyright 91963 R. A. Fisher and F. Yates. Adapted and reprinted with permission of Pearson Eflucation Limited.
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TABLE B.2 THE t DISTRIBUTION Table entries are values of t corresponding to proportions in one tail or in two tails combined. One tail (either right or left) Two tails combined Proportion in One Tail 0.25 0.10 0.05 0.025 0.01 0.005 Proportion in Two Tails Combined df 0.50 0.20 0.10 0.05 0.02 0.01 1 1.000 3.078 6.314 12.706 31.821 63.657 2 0.816 1.886 2.920 4.303 6.965 9.925 3 0.765 1.638 2.353 3.182 4.541 5.841 4 0.741 1.533 2.132 2.776 3.747 4.604 5 0.727 1.476 2.015 2.571 3.365 4.032 6 0.718 1.440 1.943 2.447 3.143 3.707 7 0.711 1.415 1.895 2.365 2.998 3.499 8 0.706 1.397 1.860 2.306 2.896 3.355 9 0.703 1.383 1.833 2.262 2.821 3.250 10 0.700 1.372 1.812 2.228 2.764 3.169 11 0.697 1.363 1.796 2.201 2.718 3.106 12 0.695 1.356 1.782 2.179 2.681 3.055 13 0.694 1.350 1.771 2.160 2.650 3.012 14 0.692 1.345 1.761 2.145 2.624 2.977 15 0.691 1.341 1.753 2.131 2.602 2.947 16 0.690 1.337 1.746 2.120 2.583 2.921 17 0.689 1.333 1.740 2.110 2.567 2.898 18 0.688 1.330 1.734 2.101 2.552 2.878 19 0.688 1.328 1.729 2.093 2.539 2.861 20 0.687 1.325 1.725 2.086 2.528 2.845 21 0.686 1.323 1.721 2.080 2.518 2.831 22 0.686 1.321 1.717 2.074 2.508 2.819 23 0.685 1.319 1.714 2.069 2.500 2.807 24 0.685 1.318 1.711 2.064 2.492 2.797 25 0.684 1.316 1.708 2.060 2.485 2.787 26 0.684 1.315 1.706 2.056 2.479 2.779 27 0.684 1.314 1.703 2.052 2.473 2.771 28 0.683 1.313 1.701 2.048 2.467 2.763 29 0.683 1.311 1.699 2.045 2.462 2.756 30 0.683 1.310 1.697 2.042 2.457 2.750 40 0.681 1.303 1.684 2.021 2.423 2.704 60 0.679 1.296 1.671 2.000 2.390 2.660 120 0.677 1.289 1.658 1.980 2.358 2.617 ∞ 0.674 1.282 1.645 1.960 2.326 2.576
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t-Distribution Area in Right Tail
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