2. Sweet corn of a certain variety is known to produce individual ears of corn with a mean weight of 8 ounces. A farmer is testing a new fertilizer designed to produce larger ears of corn, as measured by their weight. He selects a random sample of 10 ears of corn and determines their weight (in ounces). The data are as follows: 8.25 7.35 9.05 8.00 8.25 8.75 9.00 7.60 8.45 8.55 Do the data provide convincing evidence at the of = 0.05 level that the fertilizer had a positive impact on the weight of the corn ears