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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:

An observational study to collect data for the Analyze phase

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: 

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

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?

Social democracy can be defined as a system that:

List 6 components of a typical bacterial cell and the function of each.

Viruses acquire envelopes around their nucleocapsids during ______. 

Viruses that infect bacteria are specifically called _______. 

Bacteria living in a freshwater stream that are moved to salty seawater would  ______.