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Exercise Answer Errors:

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Since Aug 28, 2024.

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Description

Ch.1 9b
Original Question:

Question reads as follows:
b. What are the cases in this study and how many are included?

Answer Given:
10 cases: the daycare centers

Revision Suggested:

The dataframe used has a row per center and week combination, which is in line with the definition of tidy data, but this implies that each row needs to be uniquely identified, so the number of cases/observational units is 200 (10 centers * 20 weeks).

(Also might want to include the caveat that an observational unit might not be defined by a single column)

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