The following data give the 2010 gross domestic product (in billions of dollars) for all 50 states. The data are entered in alphabetical order by state (Source: Bureau of Economic Analysis).

173	49	254	103	1901	258	237	62	748	403
67	55	652	276	143	127	163	219	52	295
379	384	270	97	244	36	90	126	60	487
80	1160	425	35	478	148	174	570	49	164
40	255	1207	115	26	424	340	65	248	39

a) Calculate the mean and median for these data. Are these values of the mean and the median sample statistics or population parameters?

b) Explain. b. Do these data have a mode? Explain.