Concept explainers
a.
To graph: the function by using graphing utility
a.

Explanation of Solution
Given information: the question is
The IQ scores for a group of adults roughly follow the
Graph: Sketch the graph using graphing utility.
Step 1: Press WINDOW button to access the Window editor.
Step 2: Press
Step 3: Enter the expression
Step 4: Press
The graph is obtained as:
Interpretation:
from the above graph it is observed that the average score is
b.
To estimate: the average IQ score
b.

Answer to Problem 43E
The average IQ score is
Explanation of Solution
Given information: the question is
The IQ scores for a group of adults roughly follow the normal distribution
Calculation:
The average of a normal distribution is the
In the normal distribution equation, the
Chapter 3 Solutions
PRECALCULUS W/LIMITS:GRAPH.APPROACH(HS)
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