A restaurant company is interested in examining the effect of increasing the price of hamburgers on their sales.During the first six months of the year,they measure the number of hamburgers sold each day.They then increase the price and record the number of hamburgers sold each day for the last six months of the year.This quasi-experimental design would be an example of a(n)
A) non-equivalent control group pretest-posttest design.
B) interrupted time series design.
C) control series design.
D) reversal design.

Question

Quizplus · Accepted Answer

This design is an interrupted time series design because the intervention (i.e. increasing the price of hamburgers) occurs at a specific time point and the outcome (i.e. number of hamburgers sold) is measured before and after the intervention. There is no control group in this design, and there is no pretest for comparison purposes, making options A and C incorrect. A reversal design involves multiple phases of baseline and intervention conditions, and is not applicable in this scenario.

A Restaurant Company Is Interested in Examining the Effect of Increasing