2. The Vertical Semi-restrained Test was used to conduct ammability tests of children's sleepwear. Pieces of fabric were burned under controlled conditions. Aer the burning stopped, the length of the charred portion was measured and recorded. The same fabric samples were tested at ve different laboratories. The analysis of variance results are shown below. Source 0? 85 HE P P Factor 4 2.007 0.522 2.95 0.031 Error '3 7.608 0.117 Total 47 9.695