Question

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

Answer 1