TABLE 10-7 A Buyer for a Manufacturing Plant Suspects That His Primary

question 144

True/False

TABLE 10-7
A buyer for a manufacturing plant suspects that his primary supplier of raw materials is overcharging. In order to determine if his suspicion is correct, he contacts a second supplier and asks for the prices on various identical materials. He wants to compare these prices with those of his primary supplier. The data collected is presented in the table below, with some summary statistics presented (all of these might not be necessary to answer the questions which follow). The buyer believes that the differences are normally distributed and will use this sample to perform an appropriate test at a level of significance of 0.01.
Primary Secondary
Material Supplier Supplier Difference
1 $55 $45 $10
2 $48 $47 $1
3 $31 $32 -$1
4 $83 $77 $6
5 $37 $37 $0
6 $55 $54 $1
Sum: $309 $292 $17
Sum of Squares: $17,573 $15,472 $139
-Referring to Table 10-7, the null hypothesis should be rejected.

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Definitions:

Costs

Costs represent the monetary value spent on resources, labor, and other expenses necessary for the production of goods or services.

Sunk Cost

An expense that is irreversible and non-recoverable, hence it should not affect upcoming corporate choices.

Incremental Cost

The additional cost incurred to produce one more unit of a good or service.

Opportunity Cost

The potential benefit that is missed out on when choosing one alternative over another.