Many places establish rebate programs to promote energy savings. For example, Delaware has a rebate program for the purchase or lease of alternative fuel vehicles. Data is available to the public including the amount of the rebate. 

Download “Delaware_State_Rebates_for_Alternative-Fuel_Vehicles.” Construct a
a) Box plot of age by gender. Does it seem that the mean age of people getting rebates varies by gender?
b) Box plots of age by vehicle type. Interpret.