During a speed dating session, men and women rated each other on five attributes: fun, intelligence, shared interest, ambition, and sincerity. A difference mean was calculated as -0.74 by subtracting the scores in the following order: MALE RATINGS – FEMALE RATINGS. A confidence interval for this difference mean was calculated as: -2.21 < μdμd < 0.73. 

Can we support the claim that female ratings are consistently higher? Yes, there is statistical significance to female ratings being higher. No, there is no statistical significance to female ratings being higher. It is impossible to determine if statistical significance exists with the given information. Why or why not?