If the dress of a person does not reflect or predict his voting behaviour, the assumption is of

When dress neither reflects nor predicts voting behaviour, the assumption is of zero correlation.

Zero correlation means the two variables move independently with no linear association.

Positive correlation would mean the two rise together, which is not assumed here.

Partial correlation measures association between two variables while controlling a third, not applicable to this claim.

Fragmented correlation is not a recognised statistical concept.

The correlation coefficient ranges from minus one to plus one, with zero indicating no linear link.