What is is being tested in table 4b and what conclusion can you draw?

Table 4a: Group Statistics Female N Mean Std. Deviation Std. Error Mean healthy .00 Not Female 5446 18.9283 5.81905 .07885 1.00 Female 5532 18.4674 5.86891 .07891 E Table 4b: Independent Samples Test ttest for Equality of Means 95% Condence Interval of Sig. (2- Mean Std. Error the T df tailed) Difference Difference Difference Lower U r healthy 4.131 10975.441 0.000 0.46086 0.11155 0.24220 0.67953