A quality control manager for an automotive firm is concerned with uniformity in the number of defects in cars coming off the assembly line. If one assembly line has significantly more variability in the number of defects, then changes have to be made. The quality control manager has collected the following data:
Number of Defects
Assembly Line 1 Assembly Line 2
Mean 10 11
Variance 9 25
Sample Size 20 16
Does assembly line 2 have significantly more variability in the number of defects? Test at the .05 significance level.