The average body temperature of humans is believed to be 98.6°F with a standard deviation of 0.9°F. You randomly test the body temperature of 19 individuals and find the mean body temperature is 98.9°F. Is the mean body temperature of humans equal to 98.6°F? Assume that human body temperature is normally distributed. What is the critical value for this hypothesis test? O±2.101 O±1.729 O±1.734 O±1.645 O±1.96

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