SCENARIO 6-6 According to Investment Digest,the Arithmetic Mean of the Annual Return

question 127

Short Answer

SCENARIO 6-6
According to Investment Digest,the arithmetic mean of the annual return for common stocks over an 85-year period was 9.5% but the value of the variance was not mentioned.Also 25% of the annual returns were below 8% while 65% of the annual returns were between 8% and 11.5%.The article claimed that the distribution of annual return for common stocks was bell-shaped and approximately symmetric.Assume that this distribution is normal with the mean given above.Answer the following questions without the help of a calculator,statistical software or statistical table.
-Referring to Scenario 6-6,10% of the annual returns will be at least what amount?

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Definitions:

Tainos

Indigenous people of the Caribbean who were the first Native Americans to encounter Columbus upon his arrival to the New World.

Tenochtitlan

The capital city of the Aztec Empire, located on an island in Lake Texcoco in present-day Mexico City, known for its complex architecture and significant cultural and religious importance.

Hohokam

An ancient Native American culture centered in the present-day American Southwest, particularly in Arizona, known for their advanced irrigation canal systems.

Water Supply

The system or resources dedicated to providing water for human use, including drinking, sanitation, agriculture, and industrial processes, through means such as rivers, aquifers, and infrastructure.