CPP526 Lab 2 Q7

[ashleycc33]

Hi all! Does anyone know what the difference between the two parts of Q7 is on Lab 2? Both seem to be asking for the same proportions, but I may be misunderstanding.

[lecy]

It is a really good question that gets at the heart of logical statements - one of the fundamental building blocks of data programming.

http://ds4ps.org/dp4ss-textbook/p-050-business-logic.html

You have two statements:

• property type == commercial
• taxes are delinquent (need to operationalize this)

How you put them together matters:

But the denominator is also important here:

What proportion of commercial properties are delinquent on taxes? What proportion of delinquent tax bills are owed by commercial parcels?

One is asking about all commercial properties as the population of interest, and another is asking about all properties with delinquent taxes as the population of interest (the denominators).

If you draw a venn diagram it will start to make more sense.

[ashleycc33]

This helps thank you!