Mathematics, 20.07.2019 13:20 deasiamonay14
Afood safety guideline is that the mercury in fish should be below 1 part per million (ppm). listed below are the amounts of mercury (ppm) found in tuna sushi sampled at different stores in a major city. construct a 9999% confidence interval estimate of the mean amount of mercury in the population. does it appear that there is too much mercury in tuna sushi?
Answers: 1
![\begin{tabular}{|c|c|c|}x&$x-\bar{x}$&$(x-\bar{x})^2$\\[1ex]0.55&-0.17&0.0289\\0.74&0.02&0.0004\\0.09&-0.63&0.3969\\0.96&0.24&0.0576\\1.32&0.6&0.36\\0.50&-0.22&0.0484\\0.91&0.19&0.0361\\[1ex] \Sigma x=5.07&&$\Sigma(x-\bar{x})^2=0.9283$ \end{tabular}\\ \\ \bar{x}=\frac{5.07}{7}=0.7243\\ \\s= \sqrt{\frac{\Sigma(x-\bar{x})^2}{n-1}} = \sqrt{\frac{0.9283}{7-1} }=\sqrt{\frac{0.9283}{6} }=\sqrt{0.1547}=0.3933](/tpl/images/0111/8108/a36a1.png)
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