Engineering Questions with Answers - Multiple Choice Questions
MCQs on Cross Validation
1 - Question
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
View Answer
Answer: d
Explanation: Cross-validation is also used to pick type of prediction function to be used.
2 - Question
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
View Answer
Answer: c
Explanation: False positive means incorrectly identified.
3 - Question
Which of the following is a common error measure?
a) Sensitivity
b) Median absolute deviation
c) Specificity
d) All of the mentioned
View Answer
Answer: d
Explanation: Sensitivity and specificity are statistical measures of the performance of a binary classification test, also known in statistics as classification function.
4 - Question
Which of the following is not a machine learning algorithm?
a) SVG
b) SVM
c) Random forest
d) None of the mentioned
View Answer
Answer: a
Explanation: SVM stands for scalable vector machine.
5 - Question
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
View Answer
Answer: d
Explanation: Random sampling with replacement is the bootstrap.
6 - Question
Which of the following is a categorical outcome?
a) RMSE
b) RSquared
c) Accuracy
d) All of the mentioned
View Answer
Answer: c
Explanation: RMSE stands for Root Mean Squared Error.
7 - Question
For k cross-validation, larger k value implies more bias.
a) True
b) False
View Answer
Answer: b
Explanation: For k cross-validation, larger k value implies less bias.
8 - Question
Which of the following method is used for trainControl resampling?
a) repeatedcv
b) svm
c) bag32
d) none of the mentioned
View Answer
Answer: a
Explanation: repeatedcv stands for repeated cross-validation.
9 - Question
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
View Answer
Answer: a
Explanation: qplot() is short for a quick plot.
10 - Question
For k cross-validation, smaller k value implies less variance.
a) True
b) False
View Answer
Answer: a
Explanation: Larger k value implies more variance.