A Market Researcher Is Interested in Determining Whether the Age $\alpha$

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

A) 12
B) 11
C) 10
D) 9
E) 6