Which of the Following Statistics Cannot Be Negative

question 60

Multiple Choice

Which of the following statistics cannot be negative?

• A) Covariance
• B) Variance
• C) E[r]
• D) Correlation coefficient

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Definitions:

Selective Pressures

The environmental factors that favor certain phenotypes over others, influencing an organism's ability to survive and reproduce.

Human Lineage

The evolutionary path leading to and including Homo sapiens, marked by significant milestones such as bipedalism and complex tool use.

Leakey's Hypothesis

A theory proposing that the development of bipedalism in human ancestors was driven by ecological changes that favored standing and walking on two legs.

Genus Homo

The taxonomic genus which includes modern humans (Homo sapiens) and closely related species.