Question: A random sample of Brand X medication has a mean of 230 mg of its active ingredient. The standard deviation of the sample is 12

A random sample of Brand X medication has a mean of 230 mg of its active ingredient. The standard deviation of the sample is 12 mg. Using the sample standard deviation as the population standard deviation, make a prediction of the actual population mean with a 95% confidence interval given these sample sizes:
a. n = 16
b. n = 100
c. n = 144

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