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\hat{y}_{p} \pm t_{\alpha / 2} s_{\varepsilon} \sqrt{\frac{1}{n}+\frac{\left(x_{p}-x\right)^{2}}{S S_{x x}}}=65.09 \pm(2.064)(12.11988495) \sqrt{\frac{1}{26}+\frac{(5-2.730769231)^{2}}{135.1153846}}