The Current (In $\mu A$ ) Necessary to Produce a Certain Level of Brightness of Certain

question 59

Essay

The current (in $\mu A$ ) necessary to produce a certain level of brightness of a television tube was measured for two different types of glass and three different types of phosphor, resulting in the accompanying data: $$\begin{array} { l | c c c } \hline & { \text { Phosphor Type } } \\& \mathbf { 1 } & \mathbf { 2 } & \mathbf { 3 } \\\hline \text { Glass 1 } & 280,290,285 & 300,310,295 & 270,285,290 \\\text { Type 2 } & 230,235,240 & 260,240,235 & 220,225,230 \\\hline\end{array}$$ Assuming that both factors are fixed, test $H _ { o A B } \text { versus } H _ { oA B }$ at level .01. Then if $H _ { o A B }$ cannot be rejected, test the two sets of main effect hypotheses.

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Definitions:

Purely Competitive

Market structures characterized by many buyers and sellers, where no single entity has the market power to influence the price of a homogeneous product.

Profit-Maximizing

The process by which a firm adjusts its production and sale to achieve the highest possible profit.

Short-Run

A period during which at least one input in the production process is fixed, affecting the firm's ability to adjust to changes in demand.

Average Total Costs

dividing the total production costs by the quantity of produced units gives the cost for each unit.