Displaying 2 results from an estimated 2 matches for "pquantile".
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quantile
2012 Jun 07
2
Basic question about confidence intervals
...he server response
time: σ = qPN
i=1(Ri − μ)2/(N − 1).
• Confidence interval for the response time at confidence
100c% is given as: [μ − zpσ/√N, μ +
zpσ/pN], where p = (1 + c)/2, and zp is the quantile
of the unit normal distribution at p.
If N <= 30, we replace zp by tp;n−1, which is the pquantile
of a t-variate with n−1 degrees of freedom,
assuming that the response time values from N runs
come from a normal distribution. We verified that
response times do come from a normal distribution
using a normal proability plot.
DISCLAIMER:\ ===============...{{dropped:31}}
2011 Mar 15
4
Element by element mean of a list of matrices
Hi All,
is there any effiective and dense/compact method to calculate the mean of a list of - of course coincident - matrices on an element by element basis? The resulting matrix' [i, j]-th element is the mean of the list's matrices' [i, j]-th elements respectively...
Iterating by for statement is quite straightforward, but I am seeking for a more elegant solution, and my attempt with