22. Body Temperatures Based on sample results in Data Set 2 “Body Temperatures” in Appendix B, assume that human body temperatures
are normally distributed with a mean of 98.20°F and a standard
deviation of 0.62°F.
a. According to emedicinehealth. com, a body temperature of 100.40F
or above is considered to be a fever. What percentage of normal and
healthy persons would be considered to have a fever? Does this
percentage suggest that a cutoff of 100.40F is appropriate?
b. Physicians want to select a minimum temperature for requiring
further medical tests. What should that temperature be if we want
only 2.0% of healthy people to exceed it? (Such a result is a false
positive, meaning that the test result is positive, but the subject is not
really sick.)