The production manager in a large undertaking randomly paid 10 visits to a work site in a month. The number of workers who reported late for duty were found to be 2,4,5,1,6,3,2,1,7, and 8 respectively. Using the Wilcoxon signed rank test, verify the claim of the production superintendent at 0.05 level of significance that on an average not more than 3 workers report late for duty.