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A magnesium ion, Mg2+, has
Experimental Studies
Research designs that involve the manipulation of one or more variables to determine their effect on one or more outcome variables.
Observational
Relating to the collection of data by observing and measuring phenomena as they occur naturally, without manipulation or intervention.
Categorical Variable
A variable that can take on one of a limited, and usually fixed, number of possible values, assigning each individual to a particular group or category.
Quantitative Variable
A type of variable that can be measured and expressed numerically, allowing for mathematical operations and statistical analysis.
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