\text { 1. } \quad * * z=\frac{x-\bar{x}}{s} \text { when } x=83, \bar{x}=91 \text { and } s=14 { }^{* *} z=\frac{{x}_{-} \bar{x}}{s} \text { when } x=83, \bar{x}=91

\text { and } z=-2.3 * * \quad z=\frac{x-\bar{x}}{s} \text { when } z=2.3, \bar{x}=91 \text { and } s=14 z=\frac{x-\bar{x}}{s} \text { when } x=83, z=-0.45 \text { and } s=14 * * \sigma=\frac{s}{\sqrt{n}} \text { when } s=17.03 \text { and } n=20 * \sigma=\frac{s}{\sqrt{n}} \text { when } \sigma=31.2 \text { and } n=20 * \sigma=\frac{s}{\sqrt{n}} \text { when } s=17.03 \text { and } \sigma=4.76 * * \hat{y}=63.1-12.3 x \text { when } x=4 \hat{y}=63.1-12.3 x \text { when } x=2 \hat{y}=63.1-12.3 x \text { when } x=0 * * \sqrt{\frac{p(1-p)}{n_{1}}+\frac{p(1-p)}{n_{2}}} \text { when } p=34, n_{1}=24, \text { and } n_{2}=31 \sqrt{\frac{p(1-p)}{n_{1}}+\frac{p(1-p)}{n_{2}}} \text { when } p=.75, n_{1}=45, \text { and } n_{2}=66 * \sqrt{\frac{p(1-p)}{n_{1}}+\frac{p(1-p)}{n_{2}}} \text { when } p=.67, n_{1}=34, \text { and } n_{2}=44