3. Let x be a random variable representing the concentration of chemical Z in human blood. Over a long time frame a population mean u = 12% or above is considered unhealthy. A patient has taken %3D 12...

Extracted text: 3. Let x be a random variable representing the concentration of chemical Z in human blood. Over a long time frame a population mean u = 12% or above is considered unhealthy. A patient has taken %3D 12 blood samples over the last two weeks. The average concentration from these 12 samples is X = 13% and s = 1.32%. a. Do these data suggest a population mean u higher than 12% for this patient? (Use a = 5%) b. Using the sample data, generate a 99% confidence interval for u.