Explanation:Data sets stored in spreadsheets, such as Microsoft’s Excel, are binary, not raw ASCII data files. 8. Which of the following is most common problem with messy data ?
A. Column headers are values
B. Variables are stored in both rows and columns
C. A single observational unit is stored in multiple tables
D. All of the mentioned
Answer:A
Explanation:Data sets stored in spreadsheets, such as Microsoft’s Excel, are binary, not raw ASCII data files. 8. Which of the following is most common problem with messy data ?
A. Column headers are values B. Variables are stored in both rows and columns C. A single observational unit is stored in multiple tables D. All of the mentioned
Explanation:Real datasets can, and often do, violate the three precepts of tidy data in almost every way imaginable. 9. tidyr is a reframing of _______ designed to accompany the tidy data framework.