ata.khalil
Member
assalam alaikom
consider the system of equations:
2000= (2T)/chi2_(1-alpha)(2n+2)
2370= (2T)/chi2_(alpha)(2n)
alpha = 0.90 (confidence level)
n : degree of freedom chi-square
T : cumulative time of experience
How to calculate n and T ?
the difficulty is how to replace "chi2_(1-alpha)(2n+2)" and "chi2_(alpha)(2n)" for a clear system of equations.
I tried to approximate the distribution chi-2 by the standard normal distribution, but I have not found the solution
voir ( mttf.jpg)
consider the system of equations:
2000= (2T)/chi2_(1-alpha)(2n+2)
2370= (2T)/chi2_(alpha)(2n)
alpha = 0.90 (confidence level)
n : degree of freedom chi-square
T : cumulative time of experience
How to calculate n and T ?
the difficulty is how to replace "chi2_(1-alpha)(2n+2)" and "chi2_(alpha)(2n)" for a clear system of equations.
I tried to approximate the distribution chi-2 by the standard normal distribution, but I have not found the solution
voir ( mttf.jpg)