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What is the format of the output from the Map function of MapReduce?

Which data type value is used for the observed response variable in a logistic regression model?

A data scientist is given an R data frame, "empdata", with the columns Age, Salary, Occupation, Education, and Gender. The data scientist would like to examine only the Salary and Occupation columns for ages greater than 40. Which command extracts the appropriate rows and columns from the data frame?

What is required in a presentation for business analysts?

What is LOESS used for?

You are using MADlib for Linear Regression analysis. Which value does the statement return?SELECT (linregr(depvar, indepvar)).r2 FROM zeta1;