For Exercises use the traditional method of hypothesis testing unless otherwise specified. Assume the assumptions have been met.

A lot of different factors contribute to air pollution. One particular factor, particulate matter, was measured for prominent cities of three continents. Particulate matter includes smoke, soot, dust, and liquid droplets from combustion such that the particle is less than 10 microns in diameter and thus capable of reaching deep into the respiratory system. The measurements are listed here. At the 0.05 level of significance, is there sufficient evidence to conclude a difference in means? If so, perform the appropriate test to find out where the differences in means are.

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Asia 79 104 40 73 Europe 34 35 30 43 Africa 33 16 43