A supplier of laptop PC power supplies uses a control chart to track the output (in watts) of each unit produced. The pattern below shows whether each unit's output was above
(a) Or below
(b) The desired specification. Research question: At α = .05, do the deviations follow a random pattern?

Transcribed Image Text:

BAABBBABABAABAABBABBAABABA AABBAAAABBAABAAAABBAABA A