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Chemistry, 04.05.2020 22:37 lydia1melton
The Environmental Protection Agency has determined that safe drinking
water should have an average pH of 7 moles per liter. You are testing water from a new source, and take 30 vials of water. Water is unsafe if it deviates too far from 7 moles per liter in either direction. The mean pH level in your sample is 6.4 moles per liter, which is slightly acidic. The standard deviation of the sample is 0.5 moles per liter.
b) A 95% confidence interval for the true mean pH level of the water is (6.21, 6.59). Interpret this interval.
c) Explain why the interval in part (b) is consistent with the result of the test in part (a).
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