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MCQs

Total Questions : 10
Question 1. Which of the following is Mac menu command ?
  1.    browse.workspace
  2.    browse.works
  3.    browser.workspace
  4.    a statistical transformation
 Discuss Question
Answer: Option A. -> browse.workspace


It is a Mac menu command that creates a window with information about all variables in the workspace.


Question 2. Which of the following may be used for linear regression ?
  1.    X %*% Y
  2.    solve(A)
  3.    solve(A,B)
  4.    All of the mentioned
 Discuss Question
Answer: Option C. -> solve(A,B)


solve(A,B) implies inverse of A * B.


Question 3. Which of the following truncates real x to integers ?
  1.    as.numeric(x)
  2.    as.integer(x)
  3.    as.order(x)
  4.    All of the mentioned
 Discuss Question
Answer: Option B. -> as.integer(x)


Compare to round(x,0) in R.


Question 4. Which of the following syntax is used to install forecast package ?
  1.    install.pack(forecast")
  2.    install.packages(cast")
  3.    install.packages(forecast")
  4.    All of the mentioned
 Discuss Question
Answer: Option C. -> install.packages(forecast")


forecast is used for time series analysis.


Question 5. ________ provides needed string operators in R.
  1.    str
  2.    forecast
  3.    stringr
  4.    All of the mentioned
 Discuss Question
Answer: Option C. -> stringr


stringr is remarkably easy to use.


Question 6. ________ contains tools for Approximate Bayesian Computation (ABC).
  1.    str
  2.    abc
  3.    zyz
  4.    All of the mentioned
 Discuss Question
Answer: Option B. -> abc


The package implements several ABC algorithms for performing parameter estimation and model selection.


Question 7. Which of the following is lattice command for producing boxplots ?
  1.    plot()
  2.    bwplot()
  3.    xyplot()
  4.    All of the mentioned
 Discuss Question
Answer: Option B. -> bwplot()


The function bwplot() makes box-and-whisker plots for numerical variables.


Question 8. Which of the following involves predicting a categorical response ?
  1.    Regression
  2.    Summarization
  3.    Clustering
  4.    Classification
 Discuss Question
Answer: Option D. -> Classification


Classification techniques are widely used in data mining to classify data.


Question 9. Which of the following package contains functions for reading and displaying satellite data for oceanographic applications with R ?
  1.    saves
  2.    satin
  3.    saws
  4.    All of the mentioned
 Discuss Question
Answer: Option B. -> satin


saves is used for faster loading of variables.


Question 10. Which of the following groups find the correlation matrix ?
  1.    factor.model
  2.    col.max(x)
  3.    stem
  4.    which.max(x)
 Discuss Question
Answer: Option A. -> factor.model


factor.congruence is used to find the factor congruence coefficients.


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