LESSON 3
THE NORMAL CURVE
LEARNING OBJECTIVE
When you have completed this lesson, you should be able to perform the following task:
Actions:
Identify and define the six characteristics of the normal curve and apply the
normal curve to decision making situations.
Conditions:
You will be given several questions and problems dealing with the normal
curve. You may use Lesson 3, The Normal Curve, which explains the topic.
Standards:
Your explanations and solutions will be in accordance with the instructions
in this subcourse.
FRAME 44.
INTRODUCTION
The distribution which occurs most frequently in nature is called the NORMAL DISTRIBUTION.
It occurs so often and in such diverse situations that mathematicians have carefully documented
and quantified its characteristics. Examples of situations which are closely approximated by the
normal distribution include: human characteristics, such as height, weight, and IQ; the outputs of
many physical processes, such as the actual amount of paint put into a 'gallon' can; and the
results of human activity, such as consumer demand or a product.
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