A(n) ______________ is best used to compare a Machine 1 average quality characteristic to the same quality characteristic of Machine 2.
A(n) ______________ is best used to compare a Machine 1 average quality characteristic to the same quality characteristic of Machine 2.
The 2-Sample t-test is the appropriate statistical test to compare the average quality characteristic between Machine 1 and Machine 2. This test is used when you want to assess whether the means of two independent groups are significantly different from each other. Since we are comparing the same quality characteristic between two different machines, the 2-Sample t-test fits this scenario perfectly.
C is correct. Here we are comparing process performance between 2 different machines, and therefore, we will use the two-sample t-test, because the samples are coming from two different populations (machines).