One Group of Individuals Watches Commercial A

One group of individuals watches Commercial A.A different group of individuals watches Commercial B.After viewing the commercial,each group rates its intent to purchase the advertised product using a five-point scale where "5" is the best response.The average for Commercial A is 3.2 while the average for Commercial B is 4.4.Because there is more than a one-point difference between the two averages,no further statistical analyses are required to verify that the difference is not due to chance.