A 3 x 2 factorial experiment was carried out to compare three
new corn hybrids considering the change in sowing density, being
55 thousand or 65 thousand seeds per hectare. For this case,
the researcher is not interested in estimating values for other
densities, but only in verifying if one density differs from
the other. The experiment was carried out according to a
completely randomized design with 4 repetitions of each treatment.