DataX APPLIED LAB 4.1.3 -- Official Answer for Question 2

[Ben DiMolfetta]

Hello Everyone!

I am working through Lab 4.1.3 APPLIED LAB in the DataX class and I am uncertain as to the answer to Question (2) below and justification for the answer. I repeatedly get it wrong and I keep having to restart the Lab VM just to get to try the get this question correct. I think I am applying sound thinking as to what the correct answer should be, but perhaps there is someone who can provide the official answer and why it's the official answer?

(2) Which of the following columns can be calculated?
year
day
dep_delay
arr_delay
air_time
month

I am going to eventually get it right after going through all of the possible combinations but it is much appreciated if someone can help clarify why the official answer is what it is as I am misunderstanding the context of this question. I will need to explain to the students why this answer was chosen to remove any subjectivity.

I had also asked previously if there is a place where all of the DataX lab solutions and answers to all questions are posted so students can refer to them afterwards on their own time. Is there an update on this, and is there a plan to provide an answer key and/or ZIP of the completed notebooks?

Thank you!
Ben

 

[Tess Sluijter]

I am going to eventually get it right after going through all of the possible combinations [...] I will need to explain to the students why this answer was chosen to remove any subjectivity.

Without knowing the demo application or database it'll be hard to say. The question itself, "which column can be calculated?", seems to lack a lot of information as well. "Calculated" from what? "Calculated" where?

Looking at the column names I'm assuming this is for the tracking of flights, arrivals and departures.

So you tell us! Apply some critical thinking! Look at the application, what it's supposed to do.

Which data is provided for each of the flights? The data that's not given is either missing, or can be calculated from what you have.

Looking at what you have posted, I'm assuming there are more columns than just these. Othewise the dataset itself isn't even complete; I'd expect to see more columns in the database.