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Questions and Answers
What are the characteristics of individuals about which we collect information called?
What are the characteristics of individuals about which we collect information called?
- Data
- Features
- Variables (correct)
- Attributes
What do we call variables that classify individuals into categories?
What do we call variables that classify individuals into categories?
qualitative
- variables are always numerical.
- variables are always numerical.
quantitative
Qualitative variables can be divided into types * and *.
Qualitative variables can be divided into types * and *.
A * variable is a quantitative variable whose possible values can be listed.
A * variable is a quantitative variable whose possible values can be listed.
- variables can take on any value in some interval.
- variables can take on any value in some interval.
Ounces in a soda pop. Quantitative or Qualitative?
Ounces in a soda pop. Quantitative or Qualitative?
The candy bars the kids are selling are milk chocolate, milk chocolate with almonds, dark chocolate, and caramel. Is this nominal or ordinal?
The candy bars the kids are selling are milk chocolate, milk chocolate with almonds, dark chocolate, and caramel. Is this nominal or ordinal?
The number of books on a shelf. Discrete or continuous?
The number of books on a shelf. Discrete or continuous?
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Study Notes
Variables
- Characteristics of individuals from whom data are collected.
- Different types of variables influence the analysis of data.
Qualitative Variables
- Classify individuals into categories based on characteristics.
- Can be divided into two types:
- Nominal: Categories without a specific order (e.g., types of candy bars).
- Ordinal: Categories with a defined order, but not necessarily equidistant (not mentioned in detail).
Quantitative Variables
- Always numerical, allowing for mathematical operations.
- Can be subdivided into:
- Discrete: Quantitative variables that can take on specific values (e.g., number of books on a shelf).
- Continuous: Quantitative variables that can take any value within a given range (not explicitly defined in the text).
Examples
- Ounces in a soda pop serve as an example of a quantitative variable.
- Types of candy bars sold by kids illustrate nominal qualitative variables.
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