Which of the following finds row sums for each level of a grouping variable?

R - Quiz(MCQ)

rowMeans(x, na.rm = FALSE, dims = 1)

rowsum(x, group, reorder = TRUE, â€¦)

rowSums (x, na.rm = FALSE, dims = 1)

colMeans(x, na.rm = FALSE, dims = 1)

Correct Answer : rowMeans(x, na.rm = FALSE, dims = 1)

Explanation : False value leads to unexpected result.

Recently Updated in R Questions

_____ is simplest class of analytics.

Predictive

Prescriptive

Summarization

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?

Classification

Clustering

Regression

Summarization

Correct Answer : Classification

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

________ is proprietary tool for predictive analytics.

EDR

SAS

SSAS

Correct Answer : SAS

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

New Technologies MCQ's

Machine Learning

Artificial Intelligence