A nomogram to estimate the size for a random sample from a normal population for mean

1977 ◽  
Vol 114 (6) ◽  
pp. 475-478
Author(s):  
A. K. Awasthi ◽  
Surendar Kumar

SummaryA method is presented using a nomogram to estimate the size of a random sample from a normal population.

1933 ◽  
Vol 33 (3) ◽  
pp. 387-395 ◽  
Author(s):  
George Giglioli

In the preceding paper (1933) I have recorded the results of an investigation on typhoid-paratyphoid agglutinins in a random sample of the normal population of British Guiana. It has been shown what a serious cause of error these “natural” agglutinins may represent in the carrying out of routine serological work in certain countries.


2013 ◽  
Vol 63 (2) ◽  
Author(s):  
Pooi Ah Hin ◽  
Soo Huei Ching

The Jarque-Bera test is a test based on the coefficients of skewness (S) and kurtosis (K) for testing whether the given random sample is from a normal population. When the random sample of size n contains m outliers, we use the remaining n-m observations to compute two statistics S* and K* which mimic the statistics S and K. The statistics S* and  K* are next  transformed to z1 and z2 which are uncorrelated and having standard normal distributions when the original population is normal. We show that the acceptance region given by a circle in the (z1, z2) plane is suitable for testing the normality assumption.


2016 ◽  
Vol 37 (1) ◽  
pp. 49-55 ◽  
Author(s):  
Alberto Dionigi

Abstract. In recent years, both professional and volunteer clowns have become familiar in health settings. The clown represents a peculiar humorist’s character, strictly associated with the performer’s own personality. In this study, the Big Five personality traits (BFI) of 155 Italian clown doctors (130 volunteers and 25 professionals) were compared to published data for the normal population. This study highlighted specific differences between clown doctors and the general population: Clown doctors showed higher agreeableness, conscientiousness, openness, and extraversion, as well as lower neuroticism compared to other people. Moreover, specific differences emerged comparing volunteers and professionals: Professional clowns showed significantly lower in agreeableness compared to their unpaid colleagues. The results are also discussed with reference to previous studies conducted on groups of humorists. Clowns’ personalities showed some peculiarities that can help to explain the facility for their performances in the health setting and that are different than those of other groups of humorists.


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