Exercises

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Exercises 1.9 Exercises

The exercises for this chapter are based on the NSFG pregnancy file.

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1. Exercise 1.1.

Select the birthord column from preg, print the value counts, and compare to results published in the codebook at ftp.cdc.gov/pub/Health_Statistics/NCHS/Dataset_Documentation/NSFG/Cycle6Codebook-Pregnancy.pdf.

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2. Exercise 1.2.

Create a new column named totalwgt_kg that contains birth weight in kilograms (there are approximately 2.2 pounds per kilogram). Compute the mean and standard deviation of the new column.

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3. Exercise 1.3.

What are the pregnancy lengths for the respondent with caseid 2298?

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What was the birth weight of the first baby born to the respondent with caseid 5013? Hint: You can use and to check more than one condition in a query.

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