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Chapter 1: Problem 6

Past U.S. Presidents A data set consists of the ages at death for each of the 38 past presidents of the United States now deceased. a. Is this set of measurements a population or a sample? b. What is the variable being measured? c. Is the variable in part b quantitative or qualitative?

Short Answer

Expert verified
Answer: This set of measurements is considered a population because it includes the ages at death for all past U.S. presidents who are now deceased. If we were to only have ages at death for a select few presidents, then it would be considered a sample. Question B: What is the variable being measured? Answer: The variable being measured in this data set is the age at death of each past U.S. president who is now deceased. Question C: Is the variable in part b quantitative or qualitative? Answer: The variable, age at death, is a quantitative variable because it is a numerical value representing a specific quantity (the number of years lived by each past president). A qualitative variable would describe a category such as party affiliation or home state.

Step by step solution

01

Question A: Population or Sample?

This set of measurements is considered a population because it includes the ages at death for all past U.S. presidents who are now deceased. If we were to only have ages at death for a select few presidents, then it would be considered a sample.
02

Question B: Variable Being Measured

The variable being measured in this data set is the age at death of each past U.S. president who is now deceased.
03

Question C: Quantitative or Qualitative Variable?

The variable, age at death, is a quantitative variable because it is a numerical value representing a specific quantity (the number of years lived by each past president). A qualitative variable would describe a category such as party affiliation or home state.

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