Would this be a t-value distribution

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Reference no: EM1397754

Would this be a T-value distribution? Can you take me through the steps to determine upper and lower limits of a 95% confidence interval?

Most water treatment facilities monitor the quality of their drinking water on an hourly basis. One variable monitored is pH, which measures the degree of alkalinity or acidity in the water. A target pH level is 8.5. pH values below 8.5 is acidic and above 8.5 is alkaline, both of which are bad for health. A random sample of 20 measurements resulted in an average pH of 8.55 with a standard deviation of 0.28.

Reference no: EM1397754

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Would this be a t-value distribution : Would this be a T-value distribution? Can you take me through the steps to determine upper and lower limits of a 95% confidence interval?

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