Thermoset Corporation produces a specialty fibrous material that is used by sports equipment manufacturers. One key input used in the production process is a high grade of jute which comes from a special hybrid of jute plant. Supply issues have led to Thermoset having to use three different sources of jute in its production process over the past year. The yield or output of Thermoset's production process depends on the quality of the jute input. Table 2 shows Thermoset's output in kilograms for each of the three jute sources (A, B and C) that have been used in the past year. Each production run uses a fixed quantity of jute. Table 2. Output levels for Thermoset for each source of jute Production Jute Source Mean Median Variance S.E. Mean Runs A 44 423.6 415.2 2.50 B 25 409.4 409.4 225.3 3.00 C 36 418.2 421.2 582.4