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

question 3

Essay

The scatter plot and residual plot shown below is from a regression analysis of Prehistoric Native American projectile points. The widths of the projectiles were regressed on the length 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:

Social Referencing

This is the process by which people look to others in an environment to get cues on how to understand or react to uncertain situations or events.

Separation Anxiety

Distress of an infant or young child when a primary caregiver leaves the child in someone else’s care. Usually begins in the second half of the first year, demonstrating the infant’s capacity to recall the absent caregiver, and is viewed as a sign of attachment to that caregiver.

Easy Babies

A temperament type described by Thomas and Chess. These babies are placid, not very active, show positive affect, and are regular in their rhythms, making them easier to care for than other babies.

Slow-To-Warm Babies

Describes infants who show a cautious response to new experiences or people, gradually becoming comfortable over time.