Questions d'entretiens - Data Scientist

Explain the methods used in the project

Use some type of accuracy measure that will compare the proportion of the predicted values were correct.

Degree, Skill, Interest

I just did the math and let them know of the results and their explanation.

SQL I used Union or MAX(CASE + aggregate function) and python was about Data manipulation so I used Pandas library

When the time series is long enough so that some of the longer seasonal periods become apparent, it will be necessary to use STL, dynamic harmonic regression or TBATS _ You can use checkresiduals() command easily to have residuals plot/ ACF plot/ Histogram plot/ and Ijung box test at the same time _ you can use STL for decomposition For the detailed questions I recommend you to review all chapter of Buy the selected items together Forecasting: principles and practice by Rob J Hyndman, specially last chapter.