Replacement Times for TV Sets Are Normally Distributed with a Mean

question 46

Multiple Choice

Replacement times for TV sets are normally distributed with a mean of 8.2 years and a standard
Deviation of 1.1 years, (based on data from "Getting Things Fixed," Consumer Reports) .
(i. The replacement time that separated the top 20% from the bottom 80% is 9.124 years.
(ii. The probability that a randomly selected TV will be replaced in less than 4.0 years is 0.00.

• A) (i) and (ii) are correct statements.
• B) (i) is a correct statement but not (ii).
• C) (ii) is a correct statement but not (i).
• D) (i) and (ii) are false statements.

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Definitions:

Manic Episode

A period of abnormally elevated or irritable mood, arousal, and/or energy levels, frequently found in bipolar disorder.

Energetic

Having or showing vitality and a high level of energy or enthusiasm.

Neurotransmitters

Chemical messengers that transmit signals across a chemical synapse from one neuron to another target neuron.

Neurons

Specialized cells in the nervous system that transmit information to other nerve cells, muscle, or gland cells.