The average Wisconsin adult drinks 97.5 liters of beer each year, with a standard deviation of 7.2 liters. One researcher develops an ad campaign to reduce overall drinking levels. After playing the ads in the Milwaukee market for a few months, he randomly selects 15 local adults and measures their drinking for the next year. Below is number of liters consumed by each of the participants in the study:

102.1	105.3	88.5	91.3	103
95.3	103.2	101.8	112.2	104.7
99.8	103.9	104.4	106	104.1

Given this data and an alpha-level of .05, what should this researcher conclude about their ad? Be sure to explain the steps you took (and the calculations you performed) in order to arrive at your answer.