Quantitative Variables. As discussed in the section on variables in Chapter 1, quantitative variables are variables measured on a numeric scale. Height, weight, response time, subjective rating of pain, temperature, and score on an exam are all examples of quantitative variables.
Quantitative VariablesIndependent variables (IV).Dependent variables (DV).Sample variables.Extraneous variables.
Quantitative variables are any variables where the data represent amounts (e.g. height, weight, or age). Categorical variables are any variables where the data represent groups.
Quantitative variables are numerical. They represent a measurable quantity. For example, when we speak of the population of a city, we are talking about the number of people in the city - a measurable attribute of the city. Therefore, population would be a quantitative variable.
Some examples of quantitative data include:Revenue in dollars.Weight in kilograms.Age in months or years.Length in centimeters.Distance in kilometers.Height in feet or inches.Number of weeks in a year.
Qualitative Variables. Also known as categorical variables, qualitative variables are variables with no natural sense of ordering. They are therefore measured on a nominal scale. For instance, hair color (Black, Brown, Gray, Red, Yellow) is a qualitative variable, as is name (Adam, Becky, Christina, Dave . . .).
Quantitative variables are divided into two types: discrete and continuous.
Quantitative Variables - Variables whose values result from counting or measuring something. Examples: height, weight, time in the 100 yard dash, number of items sold to a shopper. Qualitative Variables - Variables that are not measurement variables. Their values do not result from measuring or counting.
Examples of quantitative data are scores on achievement tests,number of hours of study, or weight of a subject. These data may berepresented by ordinal, interval or ratio scales and lend themselves to moststatistical manipulation. Qualitative data cannot be expressed as a number.
A variable that can be measured numerically. The data collected on a quantitative variable are called quantitative data. A variable whose values are countable.
The two types of quantitative variables are interval variables and ratio variable.
- Is the variable qualitative or quantitative? The variable is qualitative because it is an attribute characteristic.