Use the Data Given Below to Answer the Following Questions)

question 25

Essay

Use the data given below to answer the following questions).
The following extract from a manufacturer's database shows a sample of 10 suppliers, their transportation charges, and the estimated and actual total costs of supplying materials. Note: Assume a significance level of 0.05 wherever necessary.) $$\begin{array} { | l | c | c | c | } \hline \text { Supplier } & \begin{array} { c } \text { Transportation } \\\text { Charges }\end{array} & \begin{array} { c } \text { Estirnated Total } \\\text { Cost }\end{array} & \text { Actual Total Cost } \\\hline \text { Peter } & 340 & 4,500 & 4,680 \\\hline \text { Jdhry } & 560 & 4,500 & 4,790 \\\hline \text { Martin } & 480 & 4,500 & 5,110 \\\hline \text { Philip } & 290 & 4,500 & 4,780 \\\hline \text { Mark } & 370 & 4,500 & 4,810 \\\hline \text { Thomas } & 520 & 4,500 & 4,770 \\\hline \text { Jaison } & 350 & 4,500 & 5,250 \\\hline \text { David } & 430 & 4,500 & 4,930 \\\hline \text { Carter } & 510 & 4,500 & 5,010 \\\hline \text { Leonard } & 270 & 4,500 & 4,810 \\\hline\end{array}$$
-On studying the database, the manufacturer found out that the average difference between the estimated and actual total costs was $394. Based on the sample data, can the manufacturer conclude that the average difference between the estimated and actual total costs is different from zero?

---

Definitions:

Brainstem

The lower extension of the brain where it connects to the spinal cord, responsible for controlling many basic life functions such as breathing and heart rate.

Spinal Cord

A long, thin, tubular structure made up of nervous tissue, extending from the brainstem down the vertebral column, playing a critical role in transmitting neural signals between the brain and the rest of the body.

Pyramids

Structures in the medulla oblongata of the brain involved in the transmission of motor signals to the spinal cord.

Descending Tracts

These are pathways in the central nervous system that transmit motor signals from the brain down the spinal cord to the muscles or glands.