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Population sizes for 15 classes, used in Chapter 6 of SDA to illustrate unequal-probability sampling.
data(classes)
This data frame contains the following columns:
class ID number
number of students in class
Lohr (2021), Sampling: Design and Analysis, 3rd Edition. Boca Raton, FL: CRC Press.
Lu and Lohr (2021), R Companion for Sampling: Design and Analysis, 3rd Edition, 1st Edition. Boca Raton, FL: CRC Press.