The U.S. Census Bureau computed the proportion of U.S. residents who lived in each of four geographic regions in Year A. Then a simple random sample was drawn of 1000 people living in the United States in Year B. The following table presents the results: Category Year A Proportion Year B Frequency Northeast 0.181 145 Midwest 0.245 230 South 0.347 397 West 0.227 228 Can you conclude that the proportions of people living in the various regions changed between Year A and Year B? Use the a=0.01 level of significance. Find the P-value