Pearson equivalence CI test (TOST): declares independence when the partial correlation lies within [-delta_threshold, delta_threshold].

Pass a 0-column matrix for z to run unconditionally. When boolean is true, returns an independence verdict instead of the raw p-value and correlation.

pearson_equivalence_test(
  x_values,
  y_values,
  z,
  boolean,
  significance_level,
  delta_threshold
)