Which Assumption Is Not Necessary for the Following Equation to Correctly

question 9

Multiple Choice

Which assumption is not necessary for the following equation to correctly characterize the standard error of $\beta$ 1hat?

• A) Errors are homoscedastic.
• B) Errors are not correlated with each other.
• C) Errors are heteroscedastic.
• D) The independent variable varies.

---

Definitions:

Environmental Movement

A social and political movement focused on advocating for the protection of the environment and addressing issues such as pollution and climate change.

Rachel Carson

An American marine biologist and author whose 1962 book "Silent Spring" helped advance the global environmental movement by highlighting the dangers of unregulated pesticide use.

Our Bodies, Ourselves

A book first published in 1970 offering comprehensive information on women's health and sexuality, marking a milestone in women's health advocacy.

Great Society

A set of domestic programs in the United States launched by President Lyndon B. Johnson aimed at eliminating poverty and racial injustice.