Students in an Introductory College Economics Class Were Asked How $\text { Degree of Certainty }$

Multiple Choice

Students in an introductory college economics class were asked how many credits they had earned in college, and how certain they were about their choice of major. Their replies are summarized below.                          $\text { Degree of Certainty }$
$\begin{array} { |c | c | c | c | c | } \hline \text { Credits Earned }&{ \text { Very Uncertain } } & \text { Somewhat Certain } & { \text { Very Certain} } & \text { Row Tot } \\\hline \text {Under 10 } & 14 & 16 & 6 &46 \\\hline\text { 10 through 59} & 16& 8 & 20 & 44 \\\hline \text { 60 or more } & 2 & 14 & 22 & 38\\\hline \text { Col Total } & 42 & 38 & 48 & 128\\\hline\end{array}$ For a chi-square test of independence, degrees of freedom would be:

A) 2.
B) 9.
C) 4.
D) 127.