(Choose 1 answer)
The "cold start ignition time" of an automobile engine is being investigated by a gasoline manufacturer. The following times (in seconds) were obtained for a test vehicle: 1.75, 1.92, 2.62, 2.35, 3.09, 3.15, 2.53, 1.91. The sample mean is
Α. 2.415
Β. 0.543
C. 2.440
D. 2.973
E. None of the other choices is correct
