E2.8 data frame has 17 rows and 4 columns, data
for 17 factories in Shanghai.
This data frame contains the following columns:
a numeric vector, per capita output in Chinese Yuan.
a numeric vector, number of workers in the factory.
a numeric vector, land area of the factory in sq. meters per worker.
a numeric vector, investments in Yuan per worker.
Prof. Zhang Tingwei of Tongji University, Shanghai.
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