Chapter 14.2, Problem 7Q

Recall the ${\text{FEV}}_{\text{1}}\text{/VC}$ data described in Question 5.3.2. Test $H_0:\overline{\text{μ}}=0.90$ versus $H_1:\overline{\text{μ}}=<0.80$ using a sign test. Compare this conclusion with that of a t test of $H_0:\overline{\text{μ}}=0.80$ versus $H_1:\overline{\text{μ}}<0.80$. Let $a=\mathrm{0.10.}$ Assume that $\sigma$ is unknown.