1. A forest ecologist believes that the mean height of spruce trees growing on north- and south-facing slopes of the Oak Ridges Moraine is different. 15 mature spruce trees on each slope were measured. What is the appropriate statistical test?

One sample t-test

Dependent samples t-test

Two independent samples t-test

ANOVA

Pearson's product moment correlation

Least squares regression

Contingency table (Independence)

Contingency table (Homogeneity)