Chen Integrated Systems recently received a large shipment of LKP fusion units from Anderson Industries and a large shipment of similar units from Burnett Technology. You randomly select 12 of the Anderson units and 12 of the Burnett units. The Anderson sample averaged 1092 hours of useful life, with standard deviation of 29.2 hours. The sample of Burnett units averaged 984 hours, with standard deviation of 31.4 hours. Using a 90% confidence level, construct and interpret an appropriate interval estimate of the difference in average life for the two populations represented. Assume that the distribution of useful life in the two populations represented is normal and that the two population distributions have equal standard deviations.
Answer to relevant QuestionsEngineers at Sorites Heap, Inc. are trying to assess the difference in average meltdown temperature for two competing brands of DB conical resonators, a component used in the manufacture of your company’s main product. ...Music Research Associates (MRA) is planning a study to estimate the difference in the average amount spent weekly on music download purchases by two different groups of consumers— teens under the age of 16 (Population1) ...Groton Boat Supply has received shipments of 15,000 pressurized cans of fiberglass sealant from each of its two main suppliers, Alcott Industries and Brookside, Inc. Inspectors at Groton take a simple random sample of 150 of ...In past years the average number of errors in reports issued by the accounting section of Sterling Thompson, Inc. has been 5.2. The company now has a new reporting system in place. In a random sample of 36 recent reports ...The State of Florida reported that the average unemployment benefit for people who were unemployed as the result of damage done by Hurricane Charley was $ 224 (source: floridajobs.org). You take a random sample of 200 ...
Post your question