A researcher selects a sample of 100 people to investigate the relationship between gender (male/female) and registering or not registering to vote. The sample consists of 50 females, of whom 20 are registered to vote, and 50 males, of whom 40 are registered to vote. A chi-square analysis reveals a significant relationship between gender and registering to vote. What does the significant result mean?

There are more registered voters than non-voters.

There are more male voters than female non-voters.

There are equal numbers of female and male non-voters.

The number of voters vs. non-voters differs in female vs. male populations.