Under the Least Squares Assumptions (Zero Conditional Mean for the Error

question 8

Multiple Choice

Under the least squares assumptions (zero conditional mean for the error term, X_i and Y_i being i.i.d., and X_i and u_i having finite fourth moments) , the OLS estimator for the slope and intercept

• A)has an exact normal distribution for n > 15.
• B)is BLUE.
• C)has a normal distribution even in small samples.
• D)is unbiased.

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Definitions:

Ice Cores

Cylinders of ice drilled from glaciers and ice caps, which are studied to understand past climate conditions through the analysis of trapped gas bubbles and particulate matter.

Desert Feature

Characteristics or remarkable landmarks found in desert landscapes, such as dunes, oasis, or rock formations.

Manganese Oxides

Compounds of manganese with oxygen, often found as minerals that can form in soils and sedimentary rocks.

Calcium Carbonate

A chemical compound with the formula CaCO3, found in rocks as the minerals calcite and aragonite and is the main component of pearls and the shells of marine organisms, snails, and eggs.