Fluoride is added to drinking water in many communities to help reduce cavities. However, too much fluoride is harmful and the EPA has set the maximum contaminant level goal (MCLG). For fluoride at 4.0 mg/L. An environmental watch group suspects fluoride levels are two high in a large city. They collect 40 samples over a two month period. Average fluoride level in the samples was 4.06 with a standard deviation of 0.275. With a 95% level of confidence, can the watch group conclude that the city is exceeding the MCLG?

Which of the following is true regarding the results of this analysis?

Group of answer choices

Since the p value of 0.084 is less than the allowable risk, conclude the city is over the limit.

Since the p value of 0.044 is less than the allowable risk, conclude the city is over the limit.

Since the p value is greater than the allowable risk, conclude that it is plausible that the city meets the standard.

Since the sample average is higher than the MCLG, conclude the city is over the limit.