A study by researchers at the University of Maryland addressed the question of whether the mean body temperature of humans is 98.6°F. The researchers obtained the body temperatures of 90 healthy humans. At the 1% significance level, do the data provide sufficient evidence to conclude that the mean body temperature of healthy humans differs from 98.6°F? Assume σ = 0.63. The sample yields x = 98.42°F.
a) Classify the hypothesis test as two-tailed, left-tailed, or right-tailed (circle the correct answer below): Two-tailed Left-tailed Right-tailed
b) Determine the decision criteria (CV):
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