In the APT Model, What Is the Nonsystematic Standard Deviation $\sigma$

question 12

Multiple Choice

In the APT model, what is the nonsystematic standard deviation of an equally-weighted portfolio that has an average value of $\sigma$ (e_i) equal to 20% and 20 securities?

• A)12.5%
• B)625%
• C)4.47%
• D)3.54%

---

Definitions:

Blood pH

The measure of acidity or alkalinity of the blood, normally maintained within a tightly regulated range of about 7.35 to 7.45.

pH Range

A scale that measures how acidic or basic a substance is, ranging from 0 (most acidic) to 14 (most basic).

Acidosis

Acidosis is a condition in which there is too much acid in the body's fluids, leading to a lower than normal pH level in the blood.

Alkalosis

Alkalosis is a condition characterized by a higher-than-normal pH level in the blood, indicating an excess of bicarbonate or a loss of acids.