TABLE 10-8
a Buyer for a Manufacturing Plant Suspects That

question 174

Short Answer

TABLE 10-8
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.
$\begin{array}{crrr}&\text { Primary}&\text { Secondary }\\\underline{\text {Material }}&\underline{\text {Supplier}}&\underline{\text { Supplier }}&\underline{\text {Difference }}\\1 & \$ 55 & \$ 45 & \$ 10 \\2 & \$ 48 & \$ 47 & \$ 1 \\3 & \$ 31 & \$ 32 & -\$ 1 \\4 & \$ 83 & \$ 77 & \$ 6 \\5 & \$ 37 & \$ 37 & \$ 0 \\6 & \$ 55 & \$ 54 & \$ 1 \\\hline \text { Sum: } & \$ 309 & \$ 292 & \$ 17\\\text { Sum of Squares: } &\$ 17,573& \$ 15,472 &\$ 139\end{array}$



-Referring to Table 10-8, what is the 95% confidence interval estimate for the mean difference in prices?

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Definitions:

Self-Gratification

The act of satisfying or fulfilling one's own desires and needs, often used in the context of seeking pleasure or happiness.

Masturbation

The sexual stimulation of one's own genitals for sexual arousal or pleasure, often resulting in orgasm.

Cause Insanity

This is not a recognized medical or psychological term; sanity or mental health conditions are complex and can be influenced by numerous factors, and the phrase "cause insanity" oversimplifies this complexity. NO.

Inhibit Sexuality

Actions or influences that suppress or delay the development of sexual feelings, desires, or expressions.