A manufacturer produces crankshafts for an automobile engine. The crankshafts wear after 100,000 miles (0.0001 inch) is of interest because it is likely to have an impact on warranty claims. A random sample of n = 15 shafts is tested and It is known that σ = 0.9 and that wear is normally distributed.

1 English 212 Study Guide: Weeks 7 & 8 Week Seven Theodore Dreiser: Sister Carrie 1. When a girl leaves her home at eighteen, she does one of two things. Either she falls into saving hands and becomes better, or she rapidly assumes the cosmopolitan standard of virtue and becomes worse. 2. It must not be...