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How many protons are in an isotope of sodium with a mass number of 25?
Significance Level
A threshold in hypothesis testing that determines the probability of rejecting a null hypothesis when it is true, commonly set at 0.05 or 5%.
Wilcoxon Signed Rank Sum Test
A non-parametric statistical hypothesis test used to compare two related samples, matched samples, or repeated measurements on a single sample to assess whether their population mean ranks differ.
Nonzero Differences
Differences between values or measurements that are not equal to zero, indicating variation or change.
Matched-Pairs Sampling
A method of sampling that involves pairing each subject with another subject that is similar in terms of key variables, then treating one with the experiment and the other with the control condition.
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