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Train Data & Test Data in Data science

Question asked by emmablisa on Feb 14, 2018
Latest reply on Feb 14, 2018 by asoudek

I am relatively new Data science in python and was exploring some competition on data science, i am getting confused with "Training data Set" and "Test Data Set" . Some projects have merged both and some they have kept separate. What is the rationale behind having two data sets. Any advise will be helpful thanks