4. A physical model suggests that the mean temperature increase in the water used as coolant in a compressor chamber should not be more than 5 Celsius. Temperature increases in the coolant measured on 8 independent runs of the compressing unit revealed the following data: 6.4, 4.3, 5.7, 4.9, 6.5, 5.9, 6.4, 5.1. Do the data contradict the assertion of the physical model