According to the August 2009 Readers Digest article "Where our Garbage Goes," the average

American tosses 4.6 pounds of garbage every day. A small town in Vermont initiated a Going

Green campaign and asked residents to work on recycling more and reducing their generation of

garbage each day. To estimate the average amount of trash discarded by people in their town,

18 households were randomly selected and all were asked to carefully weigh their trash on the

same day. The average amount for the sample was 3.89 pounds, with a standard deviation of

1.322 pounds. Is there sufficient evidence that the Vermont town now has significantly lower

average daily garbage amounts than the average American household? Use 0.05 level of

significance and assume weights are normally distributed.