In: Statistics and Probability
the following are the monthly sales (in thousands of dollars) for a company in four regions of the country.
North |
East |
South |
West |
34 28 18 24 |
47 36 30 38 44 |
40 30 41 29 |
21 30 24 37 23 |
Does the data suggest that there is a difference in the mean monthly sales among the different regions?