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 regarding flowering earlier in the season. This was an observational study.
It was a retrospective observational study such that the participants are chosen on their previous state that there is proof that first flowering has normally progressed for 47 years, but in addition to climate change, there are other variables that take account of this. Speculative, the statement researcher.
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