How to go about correcting them. Find sources for them. Analyze the quality of those sources, and come up with the most likely single date.
OR
List them in the bio something like this:
* According to the 1900 census, she was born in August 1869. (cite the census details)
* Her age at marriage in 1895, was 25, calculating back to a birth year of 1870. (cite the marriage record)
* On her death certificate, her son-in-law (the informant) gave her birth date as 23 August 1868.(cite the death certificate)
* On her gravestone, her death is simply listed as 1870.(cite the find-a-grave memorial that includes a photo of her gravestone)
etc etc