A manufacturer of computer chips has a computer hardware company as its largest customer. The computer hardware company requires all of its chips to meet specifications of 1.2 cm. The vice-president of manufacturing, concerned about a possible loss of sales, assigns his production manager the task of ensuring that chips are produced to meet the specification of 1.2 cm.
Based on the production run from last month, a 95% confidence interval was computed for the mean length of a computer chip resulting in:
95% confidence interval: (0.9 cm, 1.1 cm)
What reasons should the production manager provide to the vice-president to justify that the production team is meeting specifications?