A pharmaceutical company wishes to test a new drug with the expectation of lowering cholesterol levels. Ten subjects are randomly selected and pretested. The subjects were placed on the drug for a period of 6 months, after which their cholesterol levels were tested again. The test results, before and after, are listed below. (All units are milligrams per deciliter.) Subject 1 2 3 4 5 6 7 8 9 10 Before 195 225 202 195 175 250 235 268 190 240 After 180 220 210 175 170 250 205 250 190 225 Assuming that a hypothesis test is conducted to test the company's claim that the drug lowers cholesterol levels, what would be the test statistic