A standard painkiller is known to bring relief in 3.5 minutes on average (μ). A new painkiller is hypothesized to bring faster relief to patients. A sample of 40 patients are given the new...

A standard painkiller is known to bring relief in 3.5 minutes on average (μ). A new painkiller is hypothesized to bring
faster relief
 to patients.

A sample of 40 patients are given the new painkillers. The sample yields a mean of 2.8 minutes and a standard deviation of 1.1 minutes.

Thep-value for this test is closest to: