Elance Exams Answers PDF file

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Download PDF file of elance Zoho Creator Exam Answers

Which R function will generate a mean for each row in a numeric matrix X with intermittent missing values?

mean(X[1:length(X[,1]),], na.rm=T)
apply(X, 1, mean, na.rm=T)
by(X, 1, mean, na.rm=T)
apply(X, 1, mean)
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