Which function is used to select variables and observations from a given dataset? - R Quiz

R - Quiz(MCQ)

Which function is used to select variables and observations from a given dataset?

A)

While()

B)

Signal()

C)

Subset()

D)

Sample()

Correct Answer : Subset()

Explanation : Subset () function is used to select variables and observations from a given dataset. R has a large number of in-built functions and also the user can create their own functions.

Recently Updated in R Questions

_____ is simplest class of analytics.

A)

Predictive

B)

Prescriptive

C)

Summarization

D)

Descriptive

Correct Answer : Descriptive

Explanation : Descriptive is the simplest class of analytics. Predictive analytics can only forecast what might happen in the future because all predictive analytics are probabilistic in nature.

Which of the following involves predicting a categorical response?

A)

Classification

B)

Clustering

C)

Regression

D)

Summarization

Correct Answer : Classification

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

________ is proprietary tool for predictive analytics.

A)

R

B)

EDR

C)

SAS

D)

SSAS

Correct Answer : SAS

Explanation : SAS (Statistical Analysis System) is a software suite developed by SAS Institute for advanced analytics.

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