TABLE 8-3 A Quality Control Engineer Is Interested in the Mean Length

question 70

Short Answer

TABLE 8-3
A quality control engineer is interested in the mean length of sheet insulation being cut automatically by machine. The desired length of the insulation is 12 feet. It is known that the standard deviation in the cutting length is 0.15 feet. A sample of 70 cut sheets yields a mean length of 12.14 feet. This sample will be used to obtain a 99% confidence interval for the mean length cut by machine.
-Referring to Table 8-3, the critical value to use in obtaining the confidence interval is______

---

Definitions:

Trade Restrictions

Measures imposed by governments to control or limit the exchange of goods and services across their borders, including tariffs, quotas, and embargoes.

Comparative Advantage

The ability of an entity to produce goods or services at a lower opportunity cost than others, leading to more efficient trade.

Exports Cars

The activity of selling and shipping cars from one country to another, contributing to a country's trade balance.

Imports Cheese

The act of bringing cheese into one's country from another to sell.