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• 05:43, 19 March 2024 Admin talk contribs deleted page Sample Statistics (content was: "A population has parameters that characterizes it: <math>\mu, \sigma, \rho, p</math>, distribution. These parameters are unmeasurable, since population is usually huge. The point of '''sample statistics''' is to estimate parameters with sample characteristics: <math>\bar{X}, \hat{\mu}, \hat{\sigma}, s, \hat{\rho}, r, \hat{p}</math>. We also want to know how well our estimation is. = Sampling distribution = Let there be <math>Y_1, Y_2, \ldots, Y_n </math>, where each <math>Y_i<...")
• 18:49, 4 March 2024 Rice talk contribs created page Sample Statistics (Created page with "= Confidence Interval = The '''confidence interval''' is the range of reasonable values that are intended to contain the '''parameter of interest''' with a certain '''degree of confidence'''. ''(point estimate - margin of error, point estimate + margin of error)'' ==== Example: approval ratings ==== At every time we an approve percentage and disapprove percentage. That is our point estimate. ==== Constructing CIs ==== By CLT, <math>\bar{Y} \sim N(\mu, \frac{\sigma^2}{...") Tag: Visual edit