Phosphoric acid is chemically produced by reacting phosphate rock with sulfuric acid. An important consideration in the chemical process is the length of time required for the chemical reaction to reach a specified temperature. The shorter the length of time, the higher the reactivity of the phosphate rock. An experiment was conducted to compare the reactivity of phosphate rock mined in north, central, and south Florida. Rock samples were collected from each location and placed in vacuum bottles with a 56% strength sulfuric acid solution. The time (in seconds) for the chemical reaction to reach 200°F was recorded for each sample. Do the data (shown below) provide sufficient evidence to indicate a difference in the reactivity of phosphoric rock mined at the three locations? Test using α = .05.

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PHOSPHATE South Central North 40.6 38.1 41.1 33.5 25.6 31.3 27.5 42.0 41.9 38.3 35.7 36.4 29.5 37.5 40.2 28.2 22.8