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1st and 4th cases<\/div>\n"},{"correct":false,"tipsAndFeedback":{"tip":"","chosenFeedback":"","notChosenFeedback":""},"text":"

1st, 2nd and 4th cases<\/div>\n"},{"correct":false,"tipsAndFeedback":{"tip":"","chosenFeedback":"","notChosenFeedback":""},"text":"

3rd and 5th cases<\/div>\n"},{"correct":true,"tipsAndFeedback":{"tip":"","chosenFeedback":"You might be thinking that while you would definitely need RFE in the 3rd and 5th cases, feature elimination in the 2nd data set can be performed manually. But please note that while performing a manual elimination, you need to drop features one by one, and bringing down the number from 30 to 10 can be very time-consuming. So, it might be a good idea a perform an RFE to bring the number down to, say, 15, and then perform a manual feature elimination.\n","notChosenFeedback":""},"text":"

2nd, 3rd and 5th cases<\/div>\n"}],"overallFeedback":[{"from":0,"to":100}],"behaviour":{"enableRetry":true,"enableSolutionsButton":true,"enableCheckButton":true,"type":"auto","singlePoint":false,"randomAnswers":true,"showSolutionsRequiresInput":true,"confirmCheckDialog":false,"confirmRetryDialog":false,"autoCheck":false,"passPercentage":100,"showScorePoints":true},"UI":{"checkAnswerButton":"Check","showSolutionButton":"Show solution","tryAgainButton":"Retry","tipsLabel":"Show tip","scoreBarLabel":"You got :num out of :total points","tipAvailable":"Tip available","feedbackAvailable":"Feedback available","readFeedback":"Read feedback","wrongAnswer":"Wrong answer","correctAnswer":"Correct answer","shouldCheck":"Should have been checked","shouldNotCheck":"Should not have been checked","noInput":"Please answer before viewing the solution","a11yCheck":"Check the answers. The responses will be marked as correct, incorrect, or unanswered.","a11yShowSolution":"Show the solution. The task will be marked with its correct solution.","a11yRetry":"Retry the task. Reset all responses and start the task over again."},"confirmCheck":{"header":"Finish ?","body":"Are you sure you wish to finish ?","cancelLabel":"Cancel","confirmLabel":"Finish"},"confirmRetry":{"header":"Retry ?","body":"Are you sure you wish to retry ?","cancelLabel":"Cancel","confirmLabel":"Confirm"},"question":"

You are planning to use about 10 variables for each of these models. The number of potential variables in each of these data sets is 15, 30, 65, 10 and 100. In which of these cases would you definitely need to use RFE?<\/p>\n"}

Suppose you have to build five multiple linear regression models for five different data sets.

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