The Following Information Regarding a Dependent Variable Y and an Independent

question 10

Multiple Choice

The following information regarding a dependent variable y and an independent variable x is provided: $$\begin{array} { l l } \Sigma x = 90 & \sum \left( y - \frac { y } { ) } \right) ( x - x ) = - 156 \\\Sigma y = 340 & \Sigma \left( x - \frac { x } { 2 } \right) ^ { 2 } = 234 \\n = 4 & \sum ( y - y ) ^ { 2 } = 1974 \\\mathrm { SSR } = 104 &\end{array}$$ The y-intercept is

• A) -.667.
• B) .667.
• C) 100.
• D) -100.

---

Definitions:

Internal Validity

The degree to which a study establishes a trustworthy cause-and-effect relationship between a treatment and an outcome.

Variable Changes

Alterations in the value or status of variables within an experiment or study.

Correlation Coefficient

A numerical measure that describes the direction and degree of relationship between two variables, ranging from -1 to 1, where 0 indicates no linear relationship.

Numerical Index

A quantitative measure or indicator that represents statistical data points or trends.