THE LWN FUNCTION
If S is the frequency population of population N and µ is the frequency mean of
mean ʘ at population S and N respectively. The time in which µ is occurring is given as τ.
The function of the parameters is given as;
ɭ(τ)=ατ-τ0.5-β where α
and β are denoted as quantile coefficient of τ and quantile constant respectively.
PROOF!
The expected mean of the population S is Es=ʘµτ
and its variance is given as Vs=(ʘs2τ+µ2σ2τ) where s2 is
variance of the population S and σ2 is variance of population
N.
At normal approximation; the probability at which the occurring of
S is greater than ϒ% is given as;
P(S>-s)=P[S>-(s-ʘµτ)/(ʘs2τ+µ2σ2τ)0.5]=ϒ%
This implies that;
-s+ʘµτ=ф-1(ϒ%)(ʘs2+µ2σ2)0.5*τ0.5
-s/ф-1(ϒ%)(ʘs2+µ2σ2)0.5+ʘµτ/ф-1(ϒ%)(ʘs2+µ2σ2)0.5=τ0.5
But let α=ʘµ/ф-1(ϒ%)(ʘs2+µ2σ2)0.5
And β=s/ф-1(ϒ%)(ʘs2+µ2σ2)0.5
Therefore ατ-τ0.5-β=0,
Where α
and β are quantile coefficient of τ and quantile
constant respectively.
Proving the equation quadratically
, we have
Τ0.5=[1+(1+4αβ)0.5]/2α
The symbols S, N, ʘ, µ, and τ have different meanings, based on the area of application of the LWN Function.
REFERENCE
Adongo Ayine William(Me), Diary(2009), Posted(EMS-Bolga Branch) to Ghana Academy of Arts and Sciences in the Year 2010.
REFERENCE
Adongo Ayine William(Me), Diary(2009), Posted(EMS-Bolga Branch) to Ghana Academy of Arts and Sciences in the Year 2010.
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