Mathematics, 06.05.2020 08:26 rendaescamilla
The pH levels of a random sample of 16 chemical mixtures from a process were measured, and a sample mean ¯x = 6.861 and a sample standard deviation s = 0.440 were obtained. The scientists presented a confidence interval (6.668, [infinity]) for the average pH level of chemical mixtures from the process. What is the confidence level of this confidence interval? Suppose the pH level of the chemical mixture is normally distributed.
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