
Ages A study of all the students at a small college showed a
a. Are these numbers statistics or parameters? Explain.
b. Label both numbers with their appropriate symbol (such as
a .

Identify if the given numbers are statistics or parameters.
Answer to Problem 1SE
The given numbers are parameters.
Explanation of Solution
It is given that the study of all students in the small college showed mean age of 20.7 years and standard deviation of 2.5 years.
The numerical characteristic of the population and sample are called parameter and statistic, respectively.
The study considered all the students, which can be referred to as the population. Thus, 20.7 years is the population mean and 2.5 years is the population standard deviation. So, the given numbers are characteristics of the population.
Therefore, the given numbers are parameters.
b .

Identify the appropriate symbols for the given numbers.
Answer to Problem 1SE
The numbers can be labelled as "
Explanation of Solution
The given numbers 20.7 years and 2.5 years are population mean and population standard deviation of the ages of students in a small college, respectively.
The population mean is denoted by "
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Chapter 9 Solutions
Introductory Statistics
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