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An educator wishes to study the effects of sleep deprivation on the ability to concentrate. He...

An educator wishes to study the effects of sleep deprivation on the ability to concentrate. He decides to study the students in a calculus class. After consultation with a statistician, the educator decides to randomly allocate students to either a group that will sleep for 8 hours the night before class or 6 hours. The educator does not know which group a student belongs to when she or he comes to class.

This study is:

A) double‑blinded, because the educator does not know who belongs to the 6‑ or 8‑hour group.

B) double‑blinded, because the students have been told not to inform the educator about the treatment group they belong to.

C) a placebo controlled study, because 8 hours is normal sleeping time.

D) a single‑blinded randomized study, because the educator does not know the treatment groups students belong to but the students know.

math   Statistics-And-Probability   
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Answer #1

This is a single‑blinded randomized study, because the educator does not know the treatment groups students belong to but the students know.

Option D is correct.

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