COMPUTER SCIENCE AND ENGINEERING
MACHINE LEARNING
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Mobile usage is positively correlated with exam score
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Mobile usage is negatively correlated with exam score
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None of the mentioned
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Need some other information
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Detailed explanation-1: -The correlation coefficient is used to identify the strength of the linear relationship between two variables.
Detailed explanation-2: -When interpreting a correlation coefficient, it is important to look at: The +/– sign of the correlation coefficient.
Detailed explanation-3: -Just as a partial regression coefficient shows the relationship of y to one of the independent variables, holding constant the other variables, a partial correlation coefficient measures the strength of the relationship between y and one of the independent variables, holding constant all other variables in the model.
Detailed explanation-4: -31) Which of the following is leave-one-out cross-validation accuracy for 3-NN (3-nearest neighbor)? In Leave-One-Out cross validation, we will select (n-1) observations for training and 1 observation of validation. Consider each point as a cross validation point and then find the 3 nearest point to this point.