For Each Historical Identification Question, Define the Term and Briefly

question 87

Short Answer

For each historical identification question, define the term and briefly describe its historical significance.
Tigris and Euphrates Rivers

---

Definitions:

Planned Comparisons

Comparisons built into a research design prior to data collection.

F-ratio

A ratio used in ANOVA tests to determine whether the variances between means are significantly different.

T-test

A statistical test used to compare the means of two groups to determine if there is a significant difference between them.

Null Hypothesis

The default assumption that there is no significant difference or effect, serving as the claim that the study seeks to test or refute.