It Is Thought That Prehistoric Indians Did Not Take Their $$\begin{array} { c | c c c c c } \hline x & 5.25 & 5.75 & 6.50 & 7.00 & 7.75 \\\hline y & 38 & 37 & 66 & 80 & 82 \\\hline\end{array}$$

question 16

Multiple Choice

It is thought that prehistoric Indians did not take their best tools, pottery, and household items when they visited higher elevations for their summer camps. It is hypothesized that archaeological sites tend to lose their cultural identity and specific cultural affiliation as the elevation of the site increases. Let x be the elevation (in thousands of feet) for an archaeological site in the southwestern United States. Let y be the percentage of unidentified artifacts (no specific cultural affiliation) at a given elevation. Suppose that the following data were obtained for a collection of archaeological sites in New Mexico: $$\begin{array} { c | c c c c c } \hline x & 5.25 & 5.75 & 6.50 & 7.00 & 7.75 \\\hline y & 38 & 37 & 66 & 80 & 82 \\\hline\end{array}$$ At an archaeological site with elevation 7.5 (thousand feet) , what does the least-squares equation forecast for the percentage of culturally unidentified artifacts?

• A)82.6%
• B)87.9%
• C)17.4%
• D)12.1%
• E)27.9%

---

Definitions:

High-Scoring Groups

Teams or cohorts that achieve above average results in a given assessment or competition.

Stereotype Vulnerability

The risk of conforming to stereotypes about one's social group, which can negatively affect performance and behavior.

Grey and White Matter

Two distinct types of central nervous system tissue; grey matter contains neural cell bodies, and white matter contains nerve fibers (axons) that connect different parts of grey matter.

Arthur Jensen

A controversial American psychologist known for his work on intelligence and his argument about racial differences in IQ.