| Abstract [eng] |
Cornish and Fisher were the firsts scholars who have analysed transformations of the random variables are associated with normal distribution. They suggested formal expansions of the functions x(y) and y(x). These expansions are widely spread in the statistics, they are called Cornish – Fisher expansions. The research is investigated the normal approximations for other distributions. The research is investigated how Edgeworth expansions applied for Br. Grigelionis distributions GZD ( , , , , ) and ( , , , ). |
