Sep 29, 2015 · What is the difference between capital X-bar vs. x-bar vs. mu [closed] Ask Question Asked 10 years, 2 months ago Modified 10 years, 2 months ago

Jul 15, 2015 · My brief searching through the Statistics: Principles and Methods on books.google.com suggests that it is exactly as @Glen_b's comment describes (and most …

You need to be a little cautious about assuming that particular symbols like xbar and phat will always have the same meaning, as they are just symbols. However, those two are quite …

Sep 10, 2020 · E [X] does not depend on the sample. Certainly $\bar {x}$ depends on the sample, however.

First of all, $\bar {X}$ is not an estimator of the Normal distribution. The true mean $\mu$ (as well as the true variance $\sigma^2$) is a parameter of the Normal distribution. $\bar {X}$ is an …

Hats and tildes The convention in (my end of) applied statistics is that $\hat {\beta}$ is an estimate of the true parameter value $\beta$ and that $\tilde {\beta}$ is another, possibly competing …

I am confused how $\bar X$ is used sometimes as a constant and othertimes as a random variable. My understanding is that $\bar X$ is a random variable because it changes every …

Mar 20, 2016 · Can you edit the post explaining exactly what $x$, $\bar {x}$, $x_i$, $\bar {x}_i$ and $\mu$ are? The answer you are referring to is either wrong or does not apply to your …

For a complete solution, one needs to first show that $ Y_i:= X_i - \bar {X}$ is a Gaussian random variable, whence it suffices to find its mean and variance to characterize the distribution. …

Aug 12, 2020 · Difference between the expectation of x bar squared and the expectation of x squared Ask Question Asked 5 years, 3 months ago Modified 5 years, 3 months ago