Two punch presses are used to produce a part for automotive…

Two punch presses are used to produce a part for automotive transmissions. Scrap costs for one critical dimension are excessive.To determine whether there is a difference in variability between the two presses, a Six Sigma project team ran a small experiment. The Minitab output for the statistical analysis is shown below. Using a significance level of α = 0.05, the team concludes that:

A bakery is analyzing whether cookie height varies with the…

A bakery is analyzing whether cookie height varies with the machine that forms the dough round. There are two forming machines. An experiment was run, with twenty (20) cookies from both forming machine. Which statistical test should be used to determine whether the variability in cookie height from Machine 1 is the same as the variability in cookie height from Machine 2?

A team at a popular magazine was formed to increase subscrip…

A team at a popular magazine was formed to increase subscription response rate to direct mail offers. The team has identified eight factors in the design and mailing of the offer that could potentially affect response rate. Which tool should the team use next in order to understand the cause & effect relationship between the eight factors and subscription response rate?

A manufacturer is analyzing whether the viscosity of its deo…

A manufacturer is analyzing whether the viscosity of its deodorant product varies by supplier of the powdered wax ingredient. There are two suppliers. An experiment was run, with twenty (20) samples from each supplier. Assume the variance in viscosity is equal for both suppliers. Which statistical test should be used to determine whether the mean viscosity from Supplier 1 is the same as the mean viscosity from Supplier 2?