Question

which of the following statistical tools primarily notices trends between two variables? pythagorean theorem t-test correlation coefficient

Explanation:

• The Pythagorean theorem ($a^2 + b^2 = c^2$) relates to right - angled triangles and is not a statistical tool for analyzing variable trends.
• A t - test is mainly used to compare means between groups, not to identify trends between two variables.
• The correlation coefficient (e.g., Pearson's $r$) measures the strength and direction of the linear relationship (trend) between two quantitative variables.

Answer:

correlation coefficient