Mathematics, 24.06.2019 11:40, joselaboyNC16

Matilda sits on her back porch for one hour every morning for a week and records the types and numbers of birds that visit her bird feeder. what kind of study is this? a) double-blind studyb) sample surveyc) experimentd) observational study

Matilda sits on her back porch for one hour every morning for a week and records the types and numbe

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