Question

The following data shows resistance (ohms) of 20 equal length wires measured one a time (four each hour) for a total period of 5 hours. 1) 19 2) 18.5 3 )17 4) 19.5 5 )22 6 )20.75 7 )21 8 )16.75 9) 18 10 )20 11) 20.5 12) 16.75 13) 17.2 14) 20.4 15) 19.25 16) 19.30 17) 19.15 18) 19.85 19) 21.25 20 )20

a)Draw the appropriate control chart (s) and comment on stability or lack of if the objective is to evaluate stability in resistance measurements (Show data arrangement and computations)

b) Draw the appropriate control chart (s) and comment on stability or lack of if the objective is to evaluate variations from hour to hour.(Show data arrangement and computations)

c) if each measurement was obtained each hour,(rather than 4 at the time), what would your analysis be for part a)

d) Explain any differences between results in a) and c) if any

e) Comment on the adequacy of the data provided for part a),and c)

Answer 1