8. Let x be a random variable that represents the hemoglobin count (HC) in human blood (measured in grams per milliliter). In healthy adult females, x has an %3D approximately normal distribution with a population mean of u = 14.2, and population standard deviation of o = 2.5. Suppose a female patient had 10 blood tests over the past year, and the sample mean HC was determined to be T= 15.1. With a level of significance a .05 determine whether the patient's HC is higher %3D than the population average.

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