a.
To find: Whether the number described is a parameter or a statistic.
The number described in the given statement is a statistic.
Given information: The given statement is “The average American is about
Calculation:
The parameter describes entire population whereas the statistics describes a sample.
The data does not describe entire population. It is an approximate number. So, the number described is statistic.
Thus, the number described in the given statement is a statistic.
b.
To find: Whether the number described is a parameter or a statistic.
The number described in the given statement is a parameter.
Given information: The given statement is “In a study of laboratory rats,
Calculation:
The parameter describes entire population whereas the statistics describes a sample.
The data is formed by the entire data of rats in the laboratory. So, the number described is a parameter.
Thus, the number described in the given statement is a parameter.
Chapter 10 Solutions
PRECALCULUS:GRAPHICAL,...-NASTA ED.
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