Suppose Frances is a researcher at Beaded Gemsz, a company that makes beaded jewelry. She wants...
Suppose Frances is a researcher at Beaded Gemsz, a company that makes beaded jewelry. She wants to evaluate whether using better equipment during the current year has increased jewelry-making productivity. The company's reporting team estimated an average daily production yield of 105 units per store from previous years. Frances conducts a one-sample ?-z-test with a significance level of 0.100.10, acquiring daily unit yield data from each of the stores' databases for 45 randomly selected days of the year. She obtains...
1. 2. A company that makes shopping carts for supermarkets and other stores recently purchased some new equipment that reduces the labor content of the jobs needed to produce the shopping carts. Prior to buying the new equipment, the company used 6 workers, who together produced an average of 90 carts per hour. Workers receive $16 per hour, and machine cost was $30 per hour. With the new equipment, it was possible to transfer one of the workers to another...