Concept explainers
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 data on the baby's premature birth and behaviour. This research was a study that was observational and prospective.
Children were classified by birth and tested at 8 and 20 years of age. It gets signs of behaviour variations in children between the class of preemies and the class of full-term babies. In the premises, risky activity such as alcohol assurance of crimes and underage pregnancy is less likely to be involved. It may be the
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