A process that turns data types like Boolean from True or False to 0 or 1.  Categorical data can also be turned in to quantitative data by making a new column for every different category and adding a 1 to the corresponding attribute if it contains it. Another strategy is giving every category in a column a index, example  column "Fruit" Apple = 1, Pear = 2, Orange = 3.  

Turning Qualitative to Quantitative Data

The case of quantitative analysis of qualitative data applies when we use qualitative data to analyze the data statistically and mathematically.  


University of Michigan - Ann Arbor

Both data and analysis can be either qualitative or quantitative, meaning that there are four possible types of data and analysis combinations as follows: 

-  Quantitative analysis of quantitative data
-  Quantitative analysis of qualitative data
-  Qualitative analysis of quantitative data
-  Qualitative analysis of qualitative data

Four Possible Combinations of Qualitative-Quantitat ive Data and Analysis

Qualitative data is often refered to as categorical data becuase it consists of non-numerical data. The most commoan data types it is stored in is often Boolean or Text. This data is often collected through conducting interveiws or observations. Qualitative data is often more subjective than quantitve data. When using Qualitative data for Statistical learning, it is often within a classification problem. 

Qualitative Data 

Quantitative data is referred to as Continuous or Discrete data because it comprised of numerical data. This data is commonly stored in data types of Integer, Float, and Double. When using Quantitative data for Statistical learning it is often used in regression problems to predict a numerical output such as percent increase or decrease. This data is a an objective measurement.

Quantitative Data 

H. Russell Bernard (March 2, 2012)

*Social Research Methods: Qualitative and Quantitative Approaches, Edition 2* 

Social Research Methods: Qualitative and Quantitative Approaches, Edition 2

The case of quantitative analysis of quantitative data applies when we use numeric data to analyze the data statistically and mathematically.  

Quantitative Analysis of Quantitative Data

Quantitative Analysis of Qualitative Data

The case of qualitative analysis of quantitative data applies when we use quantitative data to interpret (qualitatively analyze) the data.  It can involve searching for patterns in the data to understand the "meaning."  

Qualitative Analysis of Quantitative Data

The case of qualitative analysis of qualitative data applies when we use qualitative data to interpret (qualitatively analyze) the data.  The qualitative data -(e.g.) texts- can be used to interpret and understand the meanings and underlying themes such as feelings of the subjects.  It allows for different interpretations, thus potentially a variety of different conclusions depending on the interpreters.  

Qualitative Analysis of Qualitative Data

Often times, statistical methods rely on measuring the distance between quantitative data points. However, there are various ways to measure this distance. These include:

1. Euclidean distance 
2. Manhattan distance
3. Hamming Distance

Measuring Distance Between Quantitative Data Points

Here is a video on the differences between discrete and continuous data.

[MooMoo Math and Science]. (2017, March 24). Continuous vs Discrete Data [Video File]. Retrieved from [www.youtube.com/watch?v=g30cI4Kbhb4](https://www.youtube.com/watch?v=g30cI4Kbhb4) 

Continuous vs Discrete Data (Reference)

If substance A leads to biological reaction B, then in general (but not 100%), a larger dose of A leads to the stronger reaction B. 


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