neither\(\style{font-family:Times New Roman;}{n_1}\)nor\(\style{font-family:Times New Roman;}{\;n_2\geq30}\).
either\(\style{font-family:Times New Roman;}{n_1}\)or\(\style{font-family:Times New Roman;}{n_2\geq30}\).
both samples are from normal populations.
either sample is from a normal population.