Step 1 :The null hypothesis is a statement of no effect or no difference. In this case, the null hypothesis would be that the mean body temperature of a healthy adult is \(98.6^\circ \mathrm{F}\).
Step 2 :The alternative hypothesis is what you might believe to be true or hope to prove true. In this case, the alternative hypothesis would be that the mean body temperature of a healthy adult is not \(98.6^\circ \mathrm{F}\).
Step 3 :Since we are not specifying whether we believe the mean body temperature to be higher or lower than \(98.6^\circ \mathrm{F}\), we should conduct a two-tailed test. This is because we are looking for a difference in either direction from the hypothesized mean.
Step 4 :The null and alternative hypotheses are: \[H_{0}: \text{The mean body temperature of a healthy adult is } 98.6^\circ \mathrm{F}\] \[H_{1}: \text{The mean body temperature of a healthy adult is not } 98.6^\circ \mathrm{F}\]
Step 5 :The type of hypothesis test to conduct is a two-tailed test.