Types of Variables

A quantitative variable that can assume a countable number of values.

• Nominal (regular) Variable

• Ordinal Variable

• Discrete Variable

• Continuous Variable

Identify the kind of variable in this situation:

length of time a football play lasts

• discrete

• continuous

Identify the kind of variable in this situation:

price of gasoline per gallon throughout American history

• discrete

• continuous

What is Quantitative Data?

• Consist of attributes, labels, or nonnumerical entries.

• Consist of numerical measurements or counts.

• Consist of a subset of the population.

What is Qualitative Data?

• Consist of attributes, labels, or nonnumerical entries.

• Consist of numerical measurements or counts.

• Consist of a subset of the population.

What is data?

• Information coming from observations, counts, measurements or responses.

• The science of collecting, organising, analysing, and interpreting data in order to make decisions.

• A numerical description of a population characteristic.

• A numerical description of a sample characteristic.

Tags

CCSS.6.SP.B.5B

The mass of the chocolate cake is 250 g.

• qualitative

• quantitative

Tags

CCSS.3.MD.A.2

The type of sports at the Olympics

• Qualitative Data
• Quantitative Data

Is the information collected during the survey numerical or categorical data?

• Numerical data. I know this because the y-axis is labeled with numbers. 
• Numerical data. I know this because the surveyor counted how many people that they surveyed. 
• Categorical data. I know this because the responses to the survey are names. 
• Categorical data. I know this because each column is a different color. 

Dress size

• Categorical: (regular) nominal

• Categorical: ordinal

• Quantitative: discrete

• Quantitative: continuous