91Ó°ÊÓ

One of the questions asked by the General Social Survey is, "Would you say you have a great deal of confidence, only some confidence, or hardly any confidence in the people running Congress?" Here are the data for a random sample of adults from the years 2002, 2006, 2010, and 2014: $$ \begin{array}{r|rrc} \text { Year } & \text { A Great Deal } & \text { Only Some } & \text { Hardly Any } \\ \hline 2014 & 93 & 651 & 900 \\ \hline 2010 & 125 & 635 & 587 \\ \hline 2006 & 209 & 1026 & 703 \\ \hline 2002 & 117 & 553 & 222 \\ \hline \end{array} $$ (a) Should you use a chi-square test of independence or homogeneity? Explain. (b) Do a complete analysis of these data, following the four-step process.