Assignment:
A study was done to measure the impact of fatigue on human performance when carrying out a certain task. The performance is measured by an appropriate index, the larger the better, which is measured at the beginning of the shift and after 3 hours of work. Ten workers are observed, resulting in the following table:
beginning after 3 hours
68 57
64 53
69 72
88 63
72 73
80 50
85 53
116 80
77 65
78 49
Is there a significant effect due to weariness?
Provide complete and step by step solution for the question and show calculations and use formulas.