FAQ: Data Types and Quality - Validity

This community-built FAQ covers the “Validity” exercise from the lesson “Data Types and Quality”.

Paths and Courses
This exercise can be found in the following Codecademy content:

FAQs on the exercise Validity

There are currently no frequently asked questions associated with this exercise – that’s where you come in! You can contribute to this section by offering your own questions, answers, or clarifications on this exercise. Ask or answer a question by clicking reply (reply) below.

If you’ve had an “aha” moment about the concepts, formatting, syntax, or anything else with this exercise, consider sharing those insights! Teaching others and answering their questions is one of the best ways to learn and stay sharp.

Join the Discussion. Help a fellow learner on their journey.

Ask or answer a question about this exercise by clicking reply (reply) below!
You can also find further discussion and get answers to your questions over in #get-help.

Agree with a comment or answer? Like (like) to up-vote the contribution!

Need broader help or resources? Head to #get-help and #community:tips-and-resources. If you are wanting feedback or inspiration for a project, check out #project.

Looking for motivation to keep learning? Join our wider discussions in #community

Learn more about how to use this guide.

Found a bug? Report it online, or post in #community:Codecademy-Bug-Reporting

Have a question about your account or billing? Reach out to our customer support team!

None of the above? Find out where to ask other questions here!

For the Validity Quiz question asking which variables would be relevant for “You want to know if trees near highways are taller than trees in cities,” would the species not also be relevant in this case? Since the species of tree would certainly affect the height and could provide more insight. For example, one would not be able to conclusively state that trees happen to grow larger in one area or the other if the same species was not growing in both. Whereas, if both species and type of location were listed and there were a specific species growing in both areas, the average height of that species could be compared between the two locations, and this would in turn solidify the hypothesis.


I agree with olditalics statement and come here for further clarification. If the forest we are in is growing redwoods and in the city we can only find Oaks then by looking at the data you would make the assumption that trees grow taller in the forest, but that would not answer the question that we were asking.