Listen 4 Suppose a city s environmental engineers are studying the amount of lead in...
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Listen 4 Suppose a city s environmental engineers are studying the amount of lead in drinking water with an acceptable amount being 34 parts per million Analyses of drinking water samples for 75 homes in a neighborhood of the city gave the following information on lead levels in parts per million Sample Size Mean Standard deviation Neighborhood 75 36 0 6 0 The environmental engineers set up the null and alternative hypotheses as follows Ho p 34 H 34 They find that p value 0 0025 and use an a 0 01 level of significance Do the environmental engineers have enough evidence to say the level of lead in the water is significantly higher than the standard Since the p value x there is insufficient evidence that the level of lead is significantly higher than the standard O Since the p value x there is sufficient evidence that the level of lead is significantly higher than the standard O Since the p value x there is insufficient evidence that the level of lead is significantly higher than the standard Since the p value a there is sufficient evidence that the level of lead is significantly higher than the standard
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