Consider the Following Regression Model: Y = ₀

question 28

Multiple Choice

Consider the following regression model: y = ₀ + ₁x₁ + u. Which of the following is a property of Ordinary Least Square (OLS) estimates of this model and their associated statistics?

• A)The sum, and therefore the sample average of the OLS residuals, is positive.
• B)The sum of the OLS residuals is negative.
• C)The sample covariance between the regressors and the OLS residuals is positive.
• D)The point ( ) always lies on the OLS regression line.

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Definitions:

Pluripotent

The ability of a cell to develop into several different types of cells in the body, characteristic of stem cells.

Stem-Cell Research

A field of study focused on the properties of stem cells and their potential to develop into different types of cells in the body, used for regenerative medicine and therapeutic applications.

Synaptic Cleft

The small gap between neurons across which neurotransmitters are released to transmit signals from one neuron to another.

Axon Terminal

The endpoint of an axon where neurotransmitters are released to send signals to other neurons or muscle cells.