A drug company want to know if new drug lowest the


A drug company want to know if new drug lowest the cholesterol below the target level of 120.A random sample of 25 questions has a mean of 115 and a standard deviation of 20 .Calculate a 99% confident interval around the mean.can we be confident that the population mean is below 120?

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Basic Statistics: A drug company want to know if new drug lowest the
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