Mathematics, 05.05.2020 03:42, anjlieoutar4795

We know that infants fall asleep easily when being gently rocked, but what would be the effect on adults? A 2019 study recruited a random sample of 18 healthy young adults to monitor their quality of sleep over two nights, assessed by the latency to deep sleep (measured in minutes, with shorter a latency being more beneficial). In random order, on one night the participants slept in a stationary bed and on the other night they slept in a bed that gently rocks. The published report states that, compared to a stationary night, continuous rocking shortened the latency to deep sleep, on average.

This study is:

A. a census (population data)
B. a cross-sectional sample survey
C. a case-control observational study
D. a longitudinal cohort study
E. an unscientific study using voluntary response
F. a completely randomized experiment

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We know that infants fall asleep easily when being gently rocked, but what would be the effect on ad...