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).

a. Calculate the mean and median for these data. Are these values of the mean and the median sample statistics or population parameters? Explain.
b. Do these data have a mode? Explain.

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173 49 62 254 103 90 258 237 652 276 143 127163 219 270 748 403 52 295 60 487 49 164 2 384 160 425 255 1207 115 379 97 244 36 90 126 35 478 148 174 570 26 424 340