A Market Researcher Is Interested in Determining Whether the Age

question 43

Multiple Choice

A market researcher is interested in determining whether the age of listeners influences their preferred musical styles.The following is a contingency table from a random sample of 385 individuals: $\begin{array}{c}\begin{array}{|l|}\hline\\\hline 18-25 \\\hline 26-35 \\\hline 36-45 \\\hline 46+ \\\hline \end{array}\begin{array}{l}\hline\text { Style } -{1}\\ \hline 125 \\\hline 87 \\\hline 50 \\\hline 12 \\\hline\end{array}\begin{array}{|l|}\hline \text { Style}-2 \\\hline 13 \\\hline 12 \\\hline 22 \\\hline 25 \\\hline \end{array}\begin{array}{l|}\hline\text { Style}-3 \\\hline 6 \\\hline 6 \\\hline 12 \\\hline 15\\\hline\end{array}\end{array}$


The researcher uses $\alpha$ = 0.05.The number of degrees of freedom is ______.

• A)12
• B)11
• C)10
• D)9
• E)6

---

Definitions:

Semi-Trailer

A trailer without a front axle, designed to be towed by a road tractor, where a significant portion of its weight and that of its load is borne by the tractor.

Full Trailer

a trailer supported by wheels front and back, designed to be towed by a vehicle with a trailer hitch rather than being semi-supported by the towing vehicle itself.

Maximum Width

The greatest horizontal breadth of an object or structure, often used in the context of vehicle regulations to ensure roadway safety.

Sliding Trailer Bogie

A component of a trailer that allows the bogie (wheel assembly) to slide along the trailer's length for weight distribution and compliance with axle weight regulations.