<prompt> Human: So Ive noticed a lot of articles on how the median savings for certain age groups are well below what they need for retirement. The sources usually reference some kind of Bank report but Im questioning whether the savings are referencing cash savings accounts or total retirement. That is, how would any given Bank know private Investments, 401k, IRA, etc. for anyone. They would only be able to report on accounts that are under their institution.  <response>: Most of those median savings by age group articles actually just pull their data from surveys or they cite a survey that was completed by some other data source. Most of them are not scientifically valid and just use publicly available surveys.They would only be able to report on accounts that are under their institution.Not even that. Its not like companies are selling private financial info to the highest bidder. 