Pacemaker specifications. A pacemaker is made up of several biomedical components that must be of a ...

  

Pacemaker specifications. A pacemaker is made up of several biomedical components that must be of a highquality for the pacemaker to work. It is vitally important for manufacturers of pacemakers to use parts that meet specifications. One particular plastic part, called a connector module, mounts on the topof the pacemaker. Connector modules are required to have a length between 0.304 inch and 0.322 inch to work properly. Any modules with length outside these limits are “out-of-spec.” Quality(Aug. 1989) reported on one supplier of connector modules that had been shipping out-of-spec parts to the manufacturer for 12 months.

a.The lengths of the connector modules produced by the supplier were found to follow an approximate normal distribution with meanμ=0.3015 inch and standard deviation σ=0.0016inch. Use this information to find the probability that the supplier produces an out ofspec part.

b.Once the problem was detected, the supplier’s inspection crew began to employ an automated data-collection system designed to improve product quality. After 2 months, the process was producing connector modules with mean μ= 0.3146 inch and standard deviation σ= 0.0030 inch. Find the probability that an out of spec part will be produced. Compare your answer to part a.