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February 12th, 2017, 03:54 PM  #1 
Newbie Joined: Feb 2017 From: Bay Area, US Posts: 5 Thanks: 0 Math Focus: 3x+1  Are birthdays quantitative or qualitative?
My teacher had a set of data on the board about baseball players, and it involved their birthday as 1/23/45 or something similar. He asked us if the data was quantitative or qualitative and then he got stumped and moved on, leaving us confused.

February 13th, 2017, 02:12 PM  #2 
Global Moderator Joined: May 2007 Posts: 6,497 Thanks: 580 
What was the data?

February 14th, 2017, 04:04 AM  #3 
Senior Member Joined: Apr 2015 From: Planet Earth Posts: 129 Thanks: 25 
The difference depends not only on what data set you look at, but how you look at it. Sometimes the same data can be examined either way. A simple test would be see if it matters, to your analysis, if you reorder the data. The average age of a MLB player today is about 28.6 years. That's a quantitative measure that indicates a distribution of birthdays that centers somewhere near the summer of 1988. If you are interested in age, you can't put those born after 1995 "before"  that is "older than"  those born before 1985 without affecting this measure. So its a quantitative analysis. If you are interested in which month produces the most players, its a qualitative analysis. It doesn't matter if you count those born in November before those born in May. In fact, some of them were. 
March 31st, 2017, 01:50 AM  #4 
Newbie Joined: Mar 2017 From: Portland, OR Posts: 5 Thanks: 0 
Quantitative is to do with numbers and counting, e.g. 5%, 10%, 15%, 10, 40. Qualitative is to do with descriptive qualities, e.g. Blue Eyes, Hazel Eyes, bigger, smaller, first If we are talking about months of births its qualitative, if numbers such as 11, 10, 5, representing days or months or years is involved as data then it is quantitative. 
March 31st, 2017, 02:05 AM  #5 
Senior Member Joined: Apr 2014 From: Glasgow Posts: 2,099 Thanks: 703 Math Focus: Physics, mathematical modelling, numerical and computational solutions 
Dates are definitely quantitative, discrete data.


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