The data shown represent two random samples gathered from two populations. Is there sufficient evidence in the data to determine whether the values of population 1 are significantly larger than the values of population 2? Use the Mann-Whitney U test and α = .01.

Sample 1 Sample 2

224 ........203

256 ........218

231 ........229

222 ........230

248 ........211

283 ........230

241 ........209

217 ........223

240 ........219

255 ........236

216 ........227

208

214