Question: The following table shows 10 communities ranked by decayed, missing, or filled (DMF) teeth per 100 children and fluoride concentration in ppm in the public

The following table shows 10 communities ranked by decayed, missing, or filled (DMF) teeth per 100 children and fluoride concentration in ppm in the public water supply:

Rank by Rank by Community DMF Teeth per 100 Children (X)

Fluoride Concentration

(Y) Community DMF Teeth per 100 Children (X)

Fluoride Concentration

(Y)

1 8 1 64 7 2 9 3 71 10 3 7 4 85 6 4 3 9 96 5 5 2810 10 2 Do these data provide sufficient evidence to indicate that the number of DMF teeth per 100 children tends to decrease as fluoride concentration increases? Let a ¼ :05.

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