To find: that it is an observational study, sample survey or an experiment and all the parameter of this study and survey and types of conclusions could be reached on the basis of given data.
Explanation of Solution
Researchers have knowledge about phthalates. This was an experiment, and to support this claim, there are no specifics given in practise.
One factor in the experiment was exposure to phthalates at 2 stages, exposure to phthalates and no exposure to phthalates, which resulted in 2 treatments.
The
The study concludes that phthalate exposure leaves a higher incidence of male reproductive damage in laboratory animals, but one day when the speculation becomes real. It's very dangerous for humans.
Chapter PIII Solutions
Stats: Modeling the World Nasta Edition Grades 9-12
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Essentials of Statistics, Books a la Carte Edition (5th Edition)
STATS:DATA+MODELS-W/DVD
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