Two gear hobbing machines, 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 mean performance for the two machines, 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:

Simple Linear Regression [whats]

A bakery is analyzing whether cookie diameter varies with baking temperature. An experiment was run, with (20) cookies baked at a “low” temperature and (20) cookies baked at a “high” temperature. Which statistical test should be used to determine whether the variability in cookie height from the “low” temperature is the same as the variability in cookie height from the “high” temperature?

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? [tool]

A portion of a manufacturing process is in the table below.  Indicate whether the activity is value added (VA) or non-value added (NVA).  (Enter either VA or NVA in the last column.)   Task     Description       Time (minutes per part)   Value Add or Non-Value Add? 1 Obtain material from Central Storage 2 [v1] 2 Wait in processing queue 15 [v2] 3 Set up grinding machine 2 [v3] 4 Load part into grinding machine 1 [v4] 5 Check position of part 1 [v5] 6 Grind part features 7 [v6] 7 Move part to inspection 3 [v7] 8 Wait at inspection 20 [v8] 9 Inspect part features 4 [v9] 10 Move part to final assembly 5 [v10] 11 Wait at final assembly 15 [v11] 12 Assemble part into final product 5 [v12] 13 Move product to shipping 8 [v13]

Which of the following experiment designs are appropriate in the Improve phase? (Select all that are appropriate.)

In a Political Economy of the Middle East, Richards and Waterbury outline three primary resources in the region. Which does not belong?

Political scientists, based on the work of Max Weber, define the state as:

Ethnic identity can be defined as:

When a virus invades a bacterium, gets that bacterial cell to make more copies of the virus that eventually burst out of and kill that same bacterial cell, this is called: