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The survival rates by passenger class were as follows:

First Class (Pclass = 1): Approximately 63%

Second Class (Pclass = 2): Approximately 47%

Third Class (Pclass = 3): Approximately 24%

This data suggests that socio-economic factors significantly influenced survival chances during the Titanic disaster. Passengers in higher classes, who were likely wealthier and had more social influence, had a higher survival rate. This could be due to a number of factors, such as better access to lifeboats, cabins closer to the deck and therefore easier escape, or preferential treatment by the crew.

It's important to note that while this data provides some insight, it's based on a single event and therefore may not be representative of maritime disasters in general. However, it does highlight the potential impact of socio-economic factors on survival rates in such situations.