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.
There is no limit on the number of cash withdrawals you may make in any one day. You may withdraw up to a maximum of $410.00 in any one day, if there are sufficient funds in your account. There is no limit on the number of POS transactions you may make in any one day.