Compare the lifetimes of ballpoint pens of three different

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A consumer magazine wants to compare the lifetimes of ballpoint pens of three different types.

Brand 1

Brand 2

Brand 3

260

181

238

218

240

257

184

162

241

219

218

213

Does the data indicate that there is a difference in the mean lifetime of the three brands.

Reference no: EM132522423

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