A confounding variable is an extraneous variable that is related to your independent variable and might affect your dependent variable. In an ideal study, there will be no confounding variables.
For example, student accounts have a limit of $100 limit per day, while non-business accounts usually are limited to $500 withdrawals a day. For business accounts, the bank offers $1000 withdrawals in one day. Chase also offers customers a withdrawal limit of $1000 every 24 hours.
1 Funds will be immediately available if the recipient accepts a transfer between Chase Accounts in a maximum amount of $500 or less (and $500 or less in the aggregate for all Chase QuickPay transfers for the day) before the cutoff time.