The Scatter Plot and Residual Plot Shown Below Are from a Regression

question 53

Essay

The scatter plot and residual plot shown below are from a regression analysis of Prehistoric Native American projectile points. The lengths of the projectiles were regressed on the width of the projectile points. Using these plots categorize each of the Basic Assumptions of the simple linear regression model as one of the following:
a) Not checkable
b) Checked and met
c) Checked and not met
For all assumptions checked, explain what aspect of the graphs led you to your conclusion that the assumption was met or not met.

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Definitions:

Sexual Reproduction

A biological process where organisms create offspring by combining the genetic material of two different cells (gametes).

Deleterious Mutations

Genetic changes that are harmful to an organism, often resulting in decreased fitness or survival.

Golden-Collared Manakins

A species of bird known for the male's vibrant yellow throat plumage and their unique courtship dances.

Sexually Selected Ornaments

Physical traits evolved through sexual selection, often used to attract mates or compete with members of the same species, such as the colorful plumage of many birds.