Say we consider triathlon times for 2 divisions: the times for the Men's Age 30-34 division areN(=4313,=583)

N(=4313,=583)and the times for the Women's Age 25-29 division areN(=5261,=807)

N(=5261,=807). These times are in seconds. Assume both sets of times follow nearly normal distributions.

Say a participant in the Women's 25-29 age division records a time of 4858 seconds, what proportion of times in this division are LOWER (faster) than this?