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Summary:

In a paper published in the JOURNAL OF MATHEMATICAL PSYCHOLOGY 39, 265274 (1995) a formula is given on page 272 for the expectation of a random variable (formula 23) and for it's variance (formula 24). Now I would like to know what the formulas look like for it's third and fourth central moment.
Inhibition in Speed and Concentration Tests:
The Poisson Inhibition Model
JAN C. dang AND AD H. G. S. VAN DER VEN
Main Question or Discussion Point
My question is as follows. In the attached paper a formula is given on page 272 for the expectation of T_{n } (formula 23) and for the variance of T_{n } (formula 24). Now I would like to know what the formulas look like for T_{n }'s third and fourth central moment.
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