A used car salesperson claims that, on average, the cars on the lot are less than 4 years old. A consumer advocate takes a sample of n = 30 cars and records their age. The sample has an average age of M = 4.2 years with s2 = 4. Conduct a one-tailed t-test with α = .01 to decide whether the average age of the cars is significantly less than 4 years.