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chere to view a t distribution table chere to view page 1 of the standard normal distribution table there to view page 2 of the standard normal distribution table is the confidence interval estimate of the population mean F d to three decimal places as needed Critical t values Critical t value negative Left tail Right tail Degrees of Freedom 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 t Distribution Critical t Values 0 005 0 01 63 657 9 925 5 841 4 604 4 032 3 707 3 499 3 355 3 250 3 169 3 106 3 055 3 012 2 977 2 947 2 921 2 898 2 878 2 861 2 845 2 831 2 819 0 01 0 02 31 821 6 965 4 541 3 747 3 365 3 143 2 998 2 896 2 821 2 764 2 718 2 681 2 650 2 624 2 602 2 583 2 567 2 552 2 539 2 528 2 518 2 508 Area in One Tail 0 025 Area in Two Tails 0 05 12 706 4 303 3 182 2 776 2 571 2 447 2 365 2 306 2 262 2 228 2 201 2 179 2 160 2 145 2 131 2 120 2 110 2 101 2 093 2 086 2 080 2 074 0 050 0 05 0 10 6 314 2 920 2 353 2 132 2 015 1 943 1 895 1 860 1 833 1 812 1 796 1 782 1 771 1 761 1 753 1 746 1 740 1 734 1 729 1 725 1 721 1 717 1 714 0 10 0 20 3 078 1 886 1 638 1 533 1 476 1 440 1 415 1 397 1 383 1 372 1 363 1 356 1 350 1 345 1 341 1 337 1 333 1 330 1 328 1 325 1 323 1 321 1 319 Degrees of Freedom 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

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