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The soft iron core in the solenoid shown is removable. Then:
Nonparametric Tests
Statistical tests that do not assume a specific distribution in the data and are used for ordinal or nominal data.
Spearman Rank
A non-parametric measure of rank correlation that assesses how well the relationship between two variables can be described using a monotonic function.
Correlation
A measure of the relationship between two variables, indicating how changes in one variable are associated with changes in another.
Friedman Two-way ANOVA
A nonparametric statistical test used to detect differences in treatments across multiple test attempts.
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