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harina [27]
3 years ago
12

Mrs, Graham conducted a study to determine how students use their time during study hall classes. She recorded what each student

did during study hall for one month.
Which type of research design did Mrs,Graham use

A sample survey
B random sample
C experimental study
D observational study

Please need help with this
Mathematics
1 answer:
Hunter-Best [27]3 years ago
8 0
D. Observational study
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