12) Based on a recent trip to Las Vegas, Big Daddy claims his career average amount won per session playing video poker is $250. Big Daddy doesn't have all of his previous results so he takes a sample of 7 sessions from his recent trip that yielded the following data: x = $280, and s = $30. Assume the population is normally distributed. Given that a = .05, find the test statistic, and state the conclusion. A) Test Statistic: Decision: t = 2.646 Reject Ho B) Test Statistic: Decision: t = 2.646 Fail to Reject HO C) Test Statistic: Decision: t = -2.646 Reject Ho D) Test Statistic: Decision: t = -2.646 Fail to Reject Ho