A Researcher Wished to Evaluate the Operating Life of a Certain

question 23

Short Answer

A researcher wished to evaluate the operating life of a certain brand of storage battery. A group of 30, brand-new batteries was selected and placed in 30 identical automobiles. The lights in each automobile were then turned on (without running the engines), and the length of time before the batteries were fully discharged (lights went out) was recorded. The scores, in hours, were: 15, 10, 20, 18, 18, 11, 11, 11, 11, 12, 12, 12, 10, 9, 9, 8, 9, 9, 11, 11, 11, 15, 12, 12, 12, 10, 12, 12, 15, 12.
-For the following set of scores, calculate the standard deviation: 10, 8, 12, 3, 6, 7, 2, 10

---

Definitions:

Clairvoyance

The presumed capacity to acquire knowledge regarding an object, individual, place, or physical occurrence without using the five traditional senses.

Telepathy

The supposed communication of thoughts or ideas without the known sensory channels, often considered a paranormal phenomenon.

Relational Aggression

An act of aggression (physical or verbal) intended to harm a person’s relationship or social standing.

Gender Typing

The acquisition of a traditional masculine or feminine role.