Chapter PIII, Problem 40RE

To determine

To Explain: the simulation for the given data carefully.

Explanation of Solution

  

No candy, one piece of candy, will be allocated randomly to the 80 dining groups. Two pieces of candy, one slice, and more later. The same form of service would be provided to them. The tips provided by the parties in these four groups were compared following the dinner.

Just one factor exists — candy giving, at 4 levels:

1) No candy

2) One piece

3) Two pieces

4) One piece and more subsequently offered.

There are 4 treatments:

1: (No candy) control

2: one candy

3: two candy

4: one more candy and offered later.

The amount of tip provided by each dining party is the response variable.

This experiment included a single blinding procedure. The dining parties do not know which dining parties to which treatments have been allocated.

No double blindness occurs. The waitress understands which parties have received what treatment.

If the waitress knows who will receive the treatment early in the meal, the waitress will offer better treatment to those receiving more candles from biassing the outcomes.

It would be easier to blind the waitress as to which dining parties are providing which care to prevent this. This could prevent the potential bias from blinding the waitress to the assignment of treatments.