I have seen z(x) = y
I know y is z-score but I'm not sure if x is the degree of freedom or the "skewness statistics"
Dear Mona,
I come across your question just now, hope you have found the answer by now, but anyway the two link below should be useful:
https://users.sussex.ac.uk/~grahamh/RM1web/APA%20format%20for%20statistical%20notation%20and%20other%20things.pdf
http://www.bryanburnham.net/wp-content/uploads/2014/01/Reporting-Statistics-in-APA-Format1.pdf
All the best
Zahra
Up to date skewness and kurtosis are not defined by the APA. In mathematics and statistics, symbols b1 to b4 are reserved for skewness coefficients (depending on the formula for calculating the coefficient). For kurtosis, it is usually the Greek letter K (kappa). See: Groeneveld, R. A., & Meeden, G. (1984). Measuring skewness and kurtosis. Journal of the Royal Statistical Society: Series D (The Statistician), 33(4), 391-399. With regard to APA, this raises problems because the b coefficients are reserved for regression and structural models, and K for Cohen's coefficient of concordance.
In addition, it is not clear which formula is used to calculate both coefficients by subsequent statistical programs, because technical documentation is not for everything. This means that you do not know exactly which result you are reporting, and therefore which symbol you should use.
The publishing practice (journal scientific articles, dissertations) is that the measures of skewness and kurtosis are redundant (and really controversial in interpretation), because either the result of the normal distribution test (for most "standard" analyzes You report statistical significance of a normality of distribution test such as the Saphiro-Wilk test) or the result of the multivariate normal distribution in the form of CR (crtitical ratio) is reported. The rest is completely redundant, so the APA does not define it. So it seems suspicious that you need to report such a result. Are you sure the reviewer knows what he/she is doing?
So in practice, use any abbreviation (eg Skew, Kurt) and describe it in the table notes. This will follow the APA mechanics and not contradict the APA symbols rules.
P.S. Seriously folks, why do you recommend a Zahra Lashgari post that links you to tables where there is no answer to question? ;)
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