The urinary fluoride concentration (parts per million) was measured both for a sample of livestock grazing...

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The urinary fluoride concentration (parts per million) wasmeasured both for a sample of livestock grazing in an areapreviously exposed to fluoride pollution and for a similar samplegrazing in an unpolluted region:
Polluted. 21.3. 18.7 23.0. 17.1. 16.8. 20.9. 19.7
Unpolluted. 14.2. 18.3. 17.2. 18.4. 20.0
Does the data indicate strongly that true average fluorideconcentration for livestock grazing in the polluted region islarger than for the unpolluted region? Use the appropriate test atlevel Î± = 0.01.

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3.8 Ratings (534 Votes)

1 represents the polluted region and 2 represents the unpollutedregionThe sample means are shown belowAlso the sample standard deviations ares12274392 s2215685and the sample sizes are n17 and n251 Null and AlternativeHypothesesThe following null and alternative hypotheses need to betestedHo 1 2True average fluoride concentration for livestock grazing in thepolluted region is equal to the of unpolluted regionHa 1 See Answer

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