The interest rate is the a-percentage of money that banks must keep in reserve.

b-rate charged by the Fed to member banks for loans.

c-cost of borrowing money.

d-control over the cost of borrowing money.

Using mr smith and his id, identify two potential internal validity threats that might affect the a—b design. tell me how that threat might impact conclusions in the a—b design. note #1: you cannot use maturation (since i already did that one for note #2: there are some mr smith id threats that won’t have much impact in a single case design.