Критерий Стъюдента

Делаю курсовую, вернее продолжаю. Сделала вычисления t-критерия Стъюдента, и нужно выяснить, не знаю как по-русски, похибка істотна p=0,05. есть таблица, забыла как использовать. буду благодарна за подсказку.

k \ α0,10,050,020,010,001
16,313812,706231,820563,6567636,6192
22,92004,30276,96469,924831,5991
32,35343,18244,54075,840912,924
42,13182,77643,74694,60418,6103
52,01502,57063,36494,03216,8688
61,94322,44693,14273,70745,9588
71,89462,36462,99803,49955,4079
81,85952,30602,89653,35545,0413
91,83312,26222,82143,24984,7809
101,81252,22812,76383,16934,5869
111,79592,20102,71813,10584,4370
121,78232,17882,68103,05454,3178
131,77092,16042,65033,01234,2208
141,76132,14482,62452,97684,1405
151,75312,13142,60252,94674,0728
161,74592,11992,58352,92084,0150
171,73962,10982,56692,89823,9651
181,73412,10092,55242,87843,9216
191,72912,09302,53952,86093,8834
201,72472,08602,52802,84533,8495
211,72072,07962,51762,83143,8193
221,71712,07392,50832,81883,7921
231,71392,06872,49992,80733,7676
241,71092,06392,49222,79693,7454
251,70812,05952,48512,78743,7251
261,70562,05552,47862,77873,7066
271,70332,05182,47272,77073,6896
281,70112,04842,46712,76333,6739
291,69912,04522,46202,75643,6594
301,69732,04232,45732,75003,6460
351,68962,03012,43772,72383,5911
401,68392,02112,42332,70453,5510
451,67942,01412,41212,68963,5203
501,67592,00862,40332,67783,4960
551,67302,0042,39612,66823,4764
601,67062,00032,39012,66033,4602
701,66691,99442,38082,64793,4350
801,66411,99012,37392,63873,4163
901,66201,98672,36852,63163,4019
1001,66021,98402,36422,62593,3905
1101,65881,98182,36072,62133,3812
1201,65771,97992,35782,61743,3735
∞1,64481,96002,32632,57583,2905