Table 5.

Williams’ test (three dose levels and one control)

Degrees of freedomQuantiles, %Williams one-tailed critical valuesCorresponding two-tailed p values for t-distribution
102.52.3410.041269
112.52.3100.041299
122.52.2840.041378
132.52.2630.041401
142.52.2450.041443
152.52.2290.041528
162.52.2160.041536
172.52.2040.041596
182.52.1940.041603
192.52.1850.041619
202.52.1770.041631
222.52.1630.041677
242.52.1510.041757
262.52.1420.041731
282.52.1330.041829
302.52.1260.041847
352.52.1120.041896
402.52.1020.041897
602.52.0780.041996
1202.52.0550.042050