An Accelerated Life Test on a Large Number of Type-D

question 74

Multiple Choice

An accelerated life test on a large number of type-D alkaline batteries revealed that the mean life for a particular use before they failed is 19.0 hours. The distribution of the lives approximated a normal distribution. The standard deviation of the distribution was 1.2 hours. About 95.44% of the batteries failed between what two values?

• A)8.9 and 18.9
• B)12.2 and 14.2
• C)14.1 and 22.1
• D)16.6 and 21.4

---

Definitions:

Unconscious

Refers to the part of the mind that is inaccessible to the conscious mind but affects thoughts and behaviors.

Collective Unconscious

Concept in psychology, proposed by Carl Jung, referring to the part of the unconscious mind that is derived from ancestral memory and experience and is common to all humankind.

Conscious

The ability to be conscious of and deliberate on one's existence, sensations, cognitions, setting, and experiences lived.

Implicit

Something implied or understood without being explicitly stated or directly communicated.