Explanation:The rename() function is designed to make this process easier. 6. The _________ function is used to generate summary statistics from the data frame within strata defined by a variable.
A. groupby()
B. group()
C. group_by()
D. arrange
Answer:A
Explanation:The rename() function is designed to make this process easier. 6. The _________ function is used to generate summary statistics from the data frame within strata defined by a variable.
A. groupby() B. group() C. group_by() D. arrange
Explanation:The general operation here is a combination of splitting a data frame into separate pieces defined by a variable or group of variables (group_by()), and then applying a summary function across those subsets (summarize()). 7. The ______ operator allows you to string operations in a left-to-right fashion.