nag_stat_inv_cdf_students_t_vector (g01tbc) Example Program Data 3 :: ltail Nag_TwoTailSignif Nag_LowerTail Nag_TwoTailConfid :: tail 3 :: lp 0.01 0.01 0.99 :: p 3 :: ldf 20.0 7.5 45.0 :: df