In an experimental study, it was noticed that people who eat more leafy, green vegetables tend to get better sleep than the general population. Researchers wonder whether the improved sleep might be caused by the minerals potassium and magnesium found in leafy, green vegetables. How could the researchers design an experiment to determine the effects of potassium and magnesium on sleep?

It was discovered in an experimental investigation that persons who consume more leafy, green vegetables slept better than the general population.
Researchers wonder if the minerals potassium and magnesium present in leafy green vegetables are responsible for the increased sleep.
An experiment must be designed to assess the effects of potassium and magnesium on sleep.

What is Phase II?

To design an experiment to determine the effects of potassium and magnesium on sleep,

Because the variables are continuous, the researcher may use multiple linear regression to assess whether the minerals potassium and magnesium present in leafy green vegetables influence enhanced sleep.

Sleep is the dependent variable.
Potassium and magnesium are the independent variables.
The regression equation helps explain the relationship between sleep, potassium, and magnesium.
To find the interactions, an interaction variable may be introduced.

Learn more about experimental studies:
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