Table Q4: Number of mistakes made by 4 technicians in five successive days Technician I Technician II Technician III Technician IV 6 14 10 9 14 9 12 12 10 12 7 8 8 10 15 10 11 14 11 11Table Q4 shows the numbers of mistakes made in five successive days for 4 technicians working at a photographic laboratory. Test at the level of significance a = 0.05 whether differences among the 4 sample means can be attributed to chance