Question: Coating type in Exercise 13-9. Use Î± = 0.01. (a) Apply Fishers LSD method with Î± = 0.05 and determine which levels of the factor

Coating type in Exercise 13-9. Use Î± = 0.01.

(a) Apply Fisher€™s LSD method with Î± = 0.05 and determine which levels of the factor differ.

(b) Use the graphical method to compare means described in this section and compare your conclusions to those from Fisher€™s LSD method.

Exercise 13-9

An electronics engineer is interested in the effect on tube conductivity of five different types of coating for cathode ray tubes in a telecommunications system display device. The following conductivity data are obtained.

Conductivity 150 137 132 132 144 Coating Type 143 152 134 129 147 146 143 127 129 142 141 149 133 127 3 4 148 144

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