Every fiber was cut from one of four spools delivered by the manufacturer. The spools are named "A1", "A2", "S1", and "S2"
+
Every fiber was cut from one of four spools delivered by the manufacturer. An analysis of the widths of fibers from each spool was performed to determine if a significant difference in quality of fiber exists between them. The spools are named "A1", "A2", "S1", and "S2", where only six fibers were cut from spool A1 so it was omitted from the analysis due to lack of representative data.