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  • 0 posts edited
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  • 26 votes cast
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 mean is 10, and standard deviation is 6?
Oct
25
comment What is the $P( |X-10| > 2)$ of a normal distribution when mean is 10, and standard deviation is 6?
for the second term are you sure it's $P(X<8)$ not $P(2<X<8)$?
Oct
25
revised What is the $P( |X-10| > 2)$ of a normal distribution when mean is 10, and standard deviation is 6?
edited tags
Oct
25
asked What is the $P( |X-10| > 2)$ of a normal distribution when mean is 10, and 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 $E(X^2) - \mu^2$
Oct
11
accepted By convention $P[X=x] = 0$ for all x. How would you explain pdf $f(x) =3x^2$ (where x is between 0 and 1) when x =0.9
Oct
11
comment By convention $P[X=x] = 0$ for all x. How would you explain pdf $f(x) =3x^2$ (where x is between 0 and 1) when x =0.9
@AndréNicolas i understand that part. but do you know what does $f(0.9)$ yield?