Statistic Class
A manufacturing company has been selected to assemble a small but important component that will be used during the construction of numerous infrastructure projects. The company anticipates the need to assemble several million components over the next several years. Company engineers select three potential assembly methods: Method A, Method B, and Method C. Management would like to select the method that produces the fewest number parts per 10,000 parts produced that do not meet specifications. It may also be possible that there is no statistical difference between the three methods in which case the lowest cost method will be selected for production. While all parts are checked before leaving the factory, the best method will reduce the number of parts that need to be recycled back into the production process.
To test each method, six batches of 10,000 components are produced using each of the three methods. The number of components out of specification are recorded in the Microsoft Excel Online file below. Analyze the data to determine if there is any difference in the mean number of components that are out of specification among the three methods. After conducting the analysis report the findings to the management team.
As part of a study designed to compare hybrid and similarly equipped conventional vehicles, a variety of classes of hybrid and all-gas model cars and sport utility vehicles (SUVs) were tested. The data showing the miles-per-gallon rating study obtained for two hybrid small cars, two hybrid midsize cars, two hybrid small SUVs, two hybrid midsize SUVs, and eight similarly equipped conventional models are contained in the Excel Online file below. Construct a spreadsheet to answer the following questions.
A study measuring the fatigue of air traffic controllers resulted in proposals for modification and redesign of the controllers’ workstation. After consideration of several designs for the workstation, three specific alternatives are selected as having the best potential for reducing controller stress. The key question is: To what extent do the three alternatives differ in terms of their effect on controller stress?
A randomized block design is used to test the hypothesis of no difference in stress levels for the three workstation alternatives. The data for the experiment is in the Microsoft Excel Online file below. Use ? = 0.05 to test for any significant differences.
A manufacturing company has been selected to assemble a small but important component that will be used during the construction of numerous infrastructure projects. The company anticipates the need to assemble several million components over the next several years. Company engineers select three potential assembly methods: Method A, Method B, and Method C. Management would like to select the method that produces the fewest number parts per 10,000 parts produced that do not meet specifications. It may also be possible that there is no statistical difference between the three methods in which case the lowest cost method will be selected for production. While all parts are checked before leaving the factory, the best method will reduce the number of parts that need to be recycled back into the production process.
To test each method, six batches of 10,000 components are produced using each of the three methods. The number of components out of specification are recorded in the Microsoft Excel Online file below. Analyze the data to determine if there is any difference in the mean number of components that are out of specificaion among the three methods. After conducting the analysis report the findings to the management team.
The International League of Triple-A minor league baseball consists of 14 teams organized into three divisions: North, South, and West. The data showing the average attendance for the 14 teams in the International League are contained in the Excel Online file below. Also shown are the teams’ records; W denotes the number of games won, L denotes the number of games lost, and PCT is the proportion of games played that were won. Construct a spreadsheet to answer the following questions.
Data for a sample of 55 members of the Baseball Hall of Fame are contained in the Excel Online file below. Use the spreadsheet below to answer the following questions.