To determine the effect of two glass types and three phosphor types on the light output of a television tube, light output is measured by the current required in series

with the tube to produce 30 foot-lamberts of light output. Thus the higher the current, in micro amperes,the poorer the tube in light output. Three observations were taken under each of the six treatment conditions and the experiment was completely randomized. The following data were recorded. a. Do an ANOVA on these data and test the effect of glass type, phosphor types, and interaction on the current flow.

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