Let 5 numbers 2, 3, 5, 9 and 10 come from a uniform distribution on the interval $[\alpha,\beta]$.
Find the method of moments estimators of $\alpha$ and $\beta$.
Any help would be appreciated, thank you!
Let 5 numbers 2, 3, 5, 9 and 10 come from a uniform distribution on the interval $[\alpha,\beta]$.
Find the method of moments estimators of $\alpha$ and $\beta$.
Any help would be appreciated, thank you!
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$\newcommand{\E}{\mathbb{E}}$Hints: The point of method of moments is that we calculate the sample moments and equate the theoretical moments to these. The sample moments are just numbers you can calculate from the sample (e.g. the average of the data is to be equated to the expression for $\E[X]$ and the average of the squares of the data to the expression for $\E[X^2]$). After doing this equating, solve simultaneously for $\alpha$ and $\beta$ to get the method of moments estimates.
For a sample $\{2,3,5,9,10\}$, the sample average is $\frac{1}{5}(2+3+5+9+10)$ and the sample second moment is $\frac{1}{5}\left(2^2+3^2+5^2+9^2+10^2\right)$.