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: The maximum safe level of bacteria per mL sample of water is 50. Suppose that...

: The maximum safe level of bacteria per mL sample of water is 50. Suppose that 60 samples of water are taken randomly from our water source. For these 60 observations, the average bacteria content is 51.7 bacteria per mL, with a standard deviation of 7 bacteria per mL. Is there reason to believe that the water is unsafe to drink?

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