New answers tagged standard-deviation
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Confidence interval for standard deviation ($\sigma$)
Although the task asks for you to obtain confidence interval, computing CI largely depends on the hypothesis being tested. In your case, you did not provide the hypothesis.
With the results you have, ...
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Linear trans on normal distribution
A variable won't be both ratio and exactly normal (at least not for strictly non-negative variables like height).
Leaving aside the issue of normality:
Lets say I have a ratio variable like $X_i$ = &...
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