single-blind study. single-blind study. Etymology: L, singulus, one by one; AS, blind + L, studere, to be busy. an experiment in which the person collecting data knows whether the subject is in the control group or the experimental group, but subjects do not. See also double-blind study.
The suit alleges that Pizza Hut's mandatory delivery fees give customers the impression that they are part of the tip, but drivers receive no portion of it, says the Associated Press.he Hut isn't the only pizza chain to get backlash from employees on shady fee practices: Last year, U.K. chain Pizza Express came under fire for keeping 8 percent of its workers' credit card tips, which it claimed was to cover credit card processing fees.
Please do not confuse this fee with the tip. You should tip the same as you normally would. The fee is a surcharge on your bill for the store and not given to the driver. In national chains like Pizza Hut, Domino's, and Papa John's, the delivery charge does not go to the driver's tip. It is a disguised price increase for the store.