Public Policy and Political Science The Metropolitan Council routinely conducts a survey to learn the opinions of Twin City residents about the region's quality of life and key regional problems and possible solutions. One key question involves the most important problem in the Twin Cities metro area, grouped by major categories. Suppose the following table contains the 2012 responses and a random sample of responses from residents in 2014.
a. Compute the proportion associated with each category for the 2012 responses.
b. Conduct a goodness-of-fit test to determine whether there is any evidence that the true 2012 population proportions have changed in 2014. Use a = 0.05.