Zoë Clark
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 Oct1 awarded Yearling Jul23 answered Work out if the relationship between 2 datasets is constant Jul22 answered Probability notation P versus Pr Jul2 comment given lognormal distribution, find expected value of its function Try using the rule of the lazy statistician: Let $Y = r(X)$ for a function $r$, then $E(Y) = E(r(X)) = \int r(x)f_X(x)dx$. Jun26 answered Beta distribution for exam P? May28 comment Markov Chain transitional probability query. I'm confused by your notation. What does $P^2 \ entry (1,1)$ mean? Dec30 comment Normal Distribution from Standard Deviation? If you have $\sum xy$ you can estimate the covariance between $X$ and $Y$ like this: $\tfrac{1}{n - 1} \sum xy - \bar{y} \sum x - \bar{x} \sum y + \bar{x}\bar{y}$. The sample means are the center of your estimated two-dimensional normal distribution. Dec28 comment Algebraic manipulation of probability distributions Thanks. I've edited the post to reflect a more general question. Any thoughts on that? Dec28 awarded Scholar Dec28 accepted Algebraic manipulation of probability distributions Dec28 revised Algebraic manipulation of probability distributions added 124 characters in body Dec27 comment Algebraic manipulation of probability distributions Thanks @MichaelHardy. To clarify, I'm referring to the $\exp\{-x/\beta\}$ version. Dec27 asked Algebraic manipulation of probability distributions Dec26 awarded Teacher Dec26 answered Normal Distribution from Standard Deviation? Dec21 awarded Editor Dec21 revised Existence of a UMP test for two binomial random variables Karlin-Rubin, not Neyman-Pearson Dec21 asked Existence of a UMP test for two binomial random variables Nov8 awarded Supporter Sep14 awarded Student