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Understand and compute confidence interval and coefficient of variation for regression model

For fixed sample mean and sample variance the only thing that is uncertain there is the distribution mean $\mu$, so you can get the confidence interval for that. … For example, my first series of measurements may give me $\bar{X}_a=10$ with confidence interval $[5,15]$ and then next series may give me $\bar{X}_b=2$ with confidence interval $[-3,7]$. …
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