What are tree based classifiers?
A. classifiers which form a tree with each attribute at one level
B. classifiers which perform series of condition checking with one attribute at a time
C. both options except none
D. not possible
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Suppose you are given 'n' predictions on test data by 'n' different models (M1, M2, .... Mn) respectively. Which of the following method(s) can be used to combine the predictions of these models?
Note: We are working on a regression problem
1. Median
2. Product
3. Average
4. Weighted sum
5. Minimum and Maximum
6. Generalized mean rule
A. 1, 3 and 4
B. 1,3 and 6
C. 1,3, 4 and 6
D. all of above
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The "curse of dimensionality" referes
A. all the problems that arise when working with data in the higher dimensions, that did not exist in the lower dimensions.
B. all the problems that arise when working with data in the lower dimensions, that did not exist in the higher dimensions.
C. all the problems that arise when working with data in the lower dimensions, that did not exist in the lower dimensions.
D. all the problems that arise when working with data in the higher dimensions, that did not exist in the higher dimensions.
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What is Decision Tree?
A. flow-chart
B. structure in which internal node represents test on an attribute, each branch represents outcome of test and each leaf node represents class label
C. both a and b
D. none of the above
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Which one of these is a tree based learner?
A. rule based
B. bayesian belief network
C. bayesian classifier
D. random forest
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It's possible to specify if the scaling process must include both mean and standard deviation using the parameters . . . . . . . .
A. with_mean=True/False
B. with_std=True/False
C. Both A & B
D. None of the Mentioned
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Consider the following dataset. x,y,z are the features and T is a class(1/0). Classify the test data (0,0,1) as values of x,y,z respectively.
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The term . . . . . . . . can be freely used, but with the same meaning adopted in physics or system theory.
A. Accuracy
B. Cluster
C. Regression
D. Prediction
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Bootstrapping allows us to
A. choose the same training instance several times.
B. choose the same test set instance several times.
C. build models with alternative subsets of the training data several times.
D. test a model with alternative subsets of the test data several times.
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What can be major issue in Leave-One-Out-Cross-Validation(LOOCV)?
A. low variance
B. high variance
C. faster runtime compared to k-fold cross validation
D. slower runtime compared to normal validation
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What is the actual number of independent parameters which need to be estimated in P dimensional Gaussian distribution model?
A. p
B. 2p
C. 2 p ( p + 1 )
D. 2 p ( p + 3 )
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Solving a non linear separation problem with a hard margin Kernelized SVM (Gaussian RBF Kernel) might lead to overfitting
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Which Association Rule would you prefer
A. high support and medium confidence
B. high support and low confidence
C. low support and high confidence
D. low support and low confidence
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Supervised learning differs from unsupervised clustering in that supervised learning requires
A. at least one input attribute.
B. input attributes to be categorical.
C. at least one output attribute.
D. output attributes to be categorical.
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Type of matrix decomposition model is
A. descriptive model
B. predictive model
C. logical model
D. none of the above
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Bayes Theorem is given by where 1. P(H) is the probability of hypothesis H being true. 2. P(E) is the probability of the evidence(regardless of the hypothesis). 3. P(E|H) is the probability of the evidence given that hypothesis is true. 4. P(H|E) is the probability of the hypothesis given that the evidence is there.
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We have been given a dataset with n records in which we have input attribute as x and output attribute as y. Suppose we use a linear regression method to model this data. To test our linear regressor, we split the data in training set and test set randomly. What do you expect will happen with bias and variance as you increase the size of training data?
A. Bias increases and Variance increases
B. Bias decreases and Variance increases
C. Bias decreases and Variance decreases
D. Bias increases and Variance decreases
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Which of the following is true about Residuals ?
A. Lower is better
B. Higher is better
C. A or B depend on the situation
D. None of these
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Prediction is
A. the result of application of specific theory or rule in a specific case
B. discipline in statistics used to find projections in multidimensional data
C. value entered in database by expert
D. independent of data
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Function used for linear regression in R is
A. lm(formula, data)
B. lr(formula, data)
C. lrm(formula, data)
D. regression.linear(formula, data)
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