Question: According to Money, a water filter (which costs about $26) will save a consumer more than $1 per gallon of water over one year compared with buying bottled water. Suppose that a random sample of 15 consumers agrees to participate in a study aimed at proving this claim, and that their results, extrapolated to savings per gallon per year are ($):
0.95, 1.07, 1.09, 1.12, 0.85, 1.17, 1.25, 0.82, 0.99, 1.02, 1.15, 0.90, 1.32, 1.01, 0.88.
Conduct the test and state your conclusion.