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 Nov 14 asked Does SSTR (sum of squares for treatments) = SSR (regression sum of squares)? Oct 29 awarded Tumbleweed Oct 27 revised Derivate of $(\sin \theta)^{n-1}$ added 2 characters in body Oct 27 answered Derivate of $(\sin \theta)^{n-1}$ Oct 27 asked what happens when you apply logarithm transformation to a data? Oct 25 accepted What is the $P( |X-10| > 2)$ of a normal distribution when the mean is 10, and the standard deviation is 6? Oct 25 comment What is the $P( |X-10| > 2)$ of a normal distribution when the mean is 10, and the standard deviation is 6? for the second term are you sure it's $P(X<8)$ not $P(2 2)$ of a normal distribution when the mean is 10, and the standard deviation is 6? edited tags Oct 25 asked What is the $P( |X-10| > 2)$ of a normal distribution when the mean is 10, and the standard deviation is 6? Oct 21 asked Stratified random sampling Oct 18 accepted Why is the greatest and least values for each group in these 2 frequency distribution unknown? Oct 17 revised Why is the greatest and least values for each group in these 2 frequency distribution unknown? added 8 characters in body Oct 17 asked Why is the greatest and least values for each group in these 2 frequency distribution unknown? Oct 17 accepted Calculating Variance of a binomial distribution using the standard formula $E(X^2) - \mu^2$ Oct 17 comment Calculating Variance of a binomial distribution using the standard formula $E(X^2) - \mu^2$ is that correct? Oct 17 comment Calculating Variance of a binomial distribution using the standard formula $E(X^2) - \mu^2$ $P(X=0) = {20 \choose 0}(0.5)^0(0.5)^{20}, P(X=1)={20 \choose 1}(0.5)(0.5)^{19}, P(X=2)={20 \choose 2}(0.5)^2(0.5)^{18}$ etc etc? Oct 17 comment Calculating Variance of a binomial distribution using the standard formula $E(X^2) - \mu^2$ i think you've posted how $np(1-p)$ is derived, but can you show me how you'd substitute the numbers from this particular question (20 games 0.5 chance of winning). you don't have to write all 20, just write the first few then use "dot dot dot" ... Oct 17 comment Calculating Variance of a binomial distribution using the standard formula $E(X^2) - \mu^2$ @Max you are correct. I made the correction. thank you Oct 17 revised Calculating Variance of a binomial distribution using the standard formula $E(X^2) - \mu^2$ added 14 characters in body Oct 17 asked Calculating Variance of a binomial distribution using the standard formula $E(X^2) - \mu^2$