The apple data frame provides the number of apples (in 100s) on
18 different apple trees. For 12 trees, the percentage of apples with
worms (x 100) is also given.
Format
This data frame contains the following columns:
size
hundreds of apples on the tree.
worms
percentage (x100) of apples harboring worms.
Details
These data constitute Table 6.1 in Little and Rubin (1987), adapted from Table 6.9.1 of
Snedecor and Cochran (1967).
Source
Little, R. J. A., and Rubin, D. B. (1987) Statistical Analysis
with Missing Data. New York: Wiley.
Snedecor, G. W., and Cochran, W. G. (1967) Statistical
Methods, 6th ed. Ames: Iowa State University Press.