The Number of Cars Sold by Three Salespersons Over a 3-Month

question 37

Essay

The number of cars sold by three salespersons over a 3-month period are shown below: $$\begin{array} { | l | c c c | } \hline & { \text { Brand of Car } } \\\hline \text { Salesperson } & \text { Brand } \mathrm { A } & \text { Brand B } & \text { Brand C } \\\hline \text { David } & 7 & 2 & 6 \\\hline \text { Edward } & 11 & 4 & 8 \\\hline \text { Frank } & 8 & 5 & 3 \\\hline\end{array}$$ Using the 5% level of significance, test for the independence of salesperson and type of product sold.

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Definitions:

Flat-Plate X-Ray

A diagnostic imaging technique involving a flat surface on which the patient lies, used to produce a two-dimensional image of an internal body part.

Abdomen

The region of the body that houses the organs of digestion, enclosed by the diaphragm at the top and the pelvis at the bottom.

Retrograde Pyelography

A diagnostic imaging test where dye is injected into the bladder and travels up the ureters to the kidneys, used to detect abnormalities.

Specific Gravity

A measure of the density of a substance compared to the density of water.