A T-Test Is __________

Multiple Choice

A t-test is __________.

A) a statistical technique used in Six Sigma to collect,analyze,and interpret data
B) a method to monitor a process over time to determine whether any variation in the process is the result of a cause or problem
C) a statistical technique for analyzing potential reliability problems and weaknesses in a product or process
D) a statistical measure to determine whether there is a statistical,not random,difference in the means of two groups of data