Quiz
Knowledge Check
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Quiz
Knowledge Check
What is the best description of raw data in an R cleaning workflow?
- A. Data received from the source system without manual alteration
- B. Data after all derived variables have been created
- C. Data with all missing values removed
- D. Data copied into a report table
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Answer: A
Why should R not become a hidden place for silently altering clinical data?
- A. Silent changes undermine traceability and may bypass the source database audit trail
- B. R cannot write files
- C. REDCap exports never contain errors
- D. Data cleaning is only a statistical task
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Answer: A
Which activity is best described as data preparation rather than correction?
- A. Deriving age at enrollment from date of birth and consent date
- B. Correcting a wrong admission date after source document review
- C. Changing a primary outcome after investigator adjudication
- D. Deleting a duplicated record without documentation
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Answer: A
What should usually happen when R identifies an impossible date sequence in a clinical database?
- A. Generate a query for review and correct the source database through the approved workflow
- B. Replace the dates in the raw CSV file
- C. Ignore the record
- D. Delete the participant from all outputs
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Answer: A