Que.Which of the following is correct use of cross validation?
|
| a. Selecting variables to include in a model |
| b. Comparing predictors |
| c. Selecting parameters in prediction function |
| d. All of the mentioned |
Que.Point out the wrong combination.
|
| a. True negative=correctly rejected |
| b. False negative=correctly rejected |
| c. False positive=correctly identified |
| d. All of the mentioned |
False positive=correctly identified
Que.Which of the following is a common error measure?
|
| a. Sensitivity |
| b. Median absolute deviation |
| c. Specificity |
| d. All of the mentioned |
Que.Which of the following is not a machine learning algorithm?
|
| a. SVG |
| b. SVM |
| c. Random forest |
| d. None of the mentioned |
Que.Point out the wrong statement.
|
| a. ROC curve stands for receiver operating characteristic |
| b. Foretime series, data must be in chunks |
| c. Random sampling must be done with replacement |
| d. None of the mentioned |
Que.Which of the following is a categorical outcome?
|
| a. RMSE |
| b. RSquared |
| c. Accuracy |
| d. All of the mentioned |
Que.For k cross-validation, larger k value implies more bias.
|
| a. True |
| b. False |
| c. May be True or False |
| d. Can’t say |
Que.Which of the following method is used for trainControl resampling?
|
| a. repeatedcv |
| b. svm |
| c. bag32 |
| d. none of the mentioned |
Que.Which of the following can be used to create the most common graph types?
|
| a. qplot |
| b. quickplot |
| c. plot |
| d. all of the mentioned |
Que.For k cross-validation, smaller k value implies less variance.
|
| a. True |
| b. False |
| c. May be True or False |
| d. Can’t say |
Que.Predicting with trees evaluate _____________ within each group of data.
|
| a. equality |
| b. homogeneity |
| c. heterogeneity |
| d. all of the mentioned |
Que.Point out the wrong statement.
|
| a. Training and testing data must be processed in different way |
| b. Test transformation would mostly be imperfect |
| c. The first goal is statistical and second is data compression in PCA |
| d. All of the mentioned |
Training and testing data must be processed in different way
Que.Which of the following method options is provided by train function for bagging?
|
| a. bagEarth |
| b. treebag |
| c. bagFDA |
| d. all of the mentioned |
Que.Which of the following is correct with respect to random forest?
|
| a. Random forest are difficult to interpret but often very accurate |
| b. Random forest are easy to interpret but often very accurate |
| c. Random forest are difficult to interpret but very less accurate |
| d. None of the mentioned |
Random forest are difficult to interpret but often very accurate
Que.Point out the correct statement.
|
| a. Prediction with regression is easy to implement |
| b. Prediction with regression is easy to interpret |
| c. Prediction with regression performs well when linear model is correct |
| d. All of the mentioned |