Question

The compact car market in the United States is extremely competitive. Data has been collected on...

The compact car market in the United States is extremely competitive. Data has been collected on sales for six of the top models for six months in 2011. It is also believed that the level of sale often varies a great deal across different months of the year. At the 0.05 level of significance, test for any significant difference in the mean number of cars sold per month for the six models (Hint: Use a randomized block design with no interaction). Explain your results briefly. (Using Minitab)

Month Chevy Cruze Ford Focus Hyundai Elantra Honda Civic Toyota Corolla VW Jetta
May 22711 22303 20006 18341 16985 16671
Jun 24896 21385 19992 18872 17485 17105
Jul 24468 17577 15713 15181 14889 14006
Aug 21897 16420 15054 14500 14093 12083
Sep 18097 16147 15023 14386 13724 10309
Oct 16244 16173 14295 13058 13000 12386

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